diff --git a/README.md b/README.md
index 17c6f73..e25581d 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Go to http://localhost:3000 to try out the playground.
     tail log.txt lines=50
 
     name = "Shrimp"
-    greet = fn person: echo "Hello" person
+    greet = do person: echo "Hello" person
 
     result = tail log.txt lines=10
 
@@ -33,7 +33,7 @@ Go to http://localhost:3000 to try out the playground.
 ## Architecture
 
 **parser/** - Lezer grammar and tokenizers that parse Shrimp code into syntax trees
-**editor/** - CodeMirror integration with syntax highlighting and language support  
+**editor/** - CodeMirror integration with syntax highlighting and language support
 **compiler/** - Transforms syntax trees into ReefVM bytecode for execution
 
 The flow: Shrimp source → parser (CST) → compiler (bytecode) → ReefVM (execution)
diff --git a/bin/shrimp b/bin/shrimp
index 49cd7f3..5706ab9 100755
--- a/bin/shrimp
+++ b/bin/shrimp
@@ -2,9 +2,11 @@
 
 import { Compiler } from '../src/compiler/compiler'
 import { colors, globals } from '../src/prelude'
+import { parser } from '../src/parser/shrimp'
+import { treeToString } from '../src/utils/tree'
 import { VM, fromValue, bytecodeToString } from 'reefvm'
 import { readFileSync, writeFileSync, mkdirSync } from 'fs'
-import { randomUUID } from "crypto"
+import { randomUUID } from 'crypto'
 import { spawn } from 'child_process'
 import { join } from 'path'
 
@@ -32,6 +34,17 @@ async function compileFile(filePath: string) {
   }
 }
 
+async function parseFile(filePath: string) {
+  try {
+    const code = readFileSync(filePath, 'utf-8')
+    const tree = parser.parse(code)
+    return treeToString(tree, code)
+  } catch (error: any) {
+    console.error(`${colors.red}Error:${colors.reset} ${error.message}`)
+    process.exit(1)
+  }
+}
+
 function showHelp() {
   console.log(`${colors.bright}${colors.magenta}🦐 Shrimp${colors.reset} is a scripting language in a shell.
 
@@ -39,6 +52,7 @@ ${colors.bright}Usage:${colors.reset} shrimp <command> [...args]
 
 ${colors.bright}Commands:${colors.reset}
   ${colors.cyan}run      ${colors.yellow}./my-file.sh${colors.reset}    Execute a file with Shrimp
+  ${colors.cyan}parse    ${colors.yellow}./my-file.sh${colors.reset}    Print parse tree for Shrimp file
   ${colors.cyan}bytecode ${colors.yellow}./my-file.sh${colors.reset}    Print bytecode for Shrimp file
   ${colors.cyan}eval     ${colors.yellow}'some code'${colors.reset}     Evaluate a line of Shrimp code     
   ${colors.cyan}repl${colors.reset}                     Start REPL
@@ -102,6 +116,16 @@ async function main() {
     return
   }
 
+  if (['parse', '-parse', '--parse', '-p'].includes(command)) {
+    const file = args[1]
+    if (!file) {
+      console.log(`${colors.bright}usage: shrimp parse <file>${colors.reset}`)
+      process.exit(1)
+    }
+    console.log(await parseFile(file))
+    return
+  }
+
   if (['run', '-run', '--run', '-r'].includes(command)) {
     const file = args[1]
     if (!file) {
diff --git a/bun.lock b/bun.lock
index afb8aaa..559b57e 100644
--- a/bun.lock
+++ b/bun.lock
@@ -62,7 +62,7 @@
 
     "hono": ["hono@4.9.8", "", {}, "sha512-JW8Bb4RFWD9iOKxg5PbUarBYGM99IcxFl2FPBo2gSJO11jjUDqlP1Bmfyqt8Z/dGhIQ63PMA9LdcLefXyIasyg=="],
 
-    "reefvm": ["reefvm@git+https://git.nose.space/defunkt/reefvm#c69b172c78853756ec8acba5bc33d93eb6a571c6", { "peerDependencies": { "typescript": "^5" } }, "c69b172c78853756ec8acba5bc33d93eb6a571c6"],
+    "reefvm": ["reefvm@git+https://git.nose.space/defunkt/reefvm#0f39e9401eb7a0a7c906e150127f9829458a79b6", { "peerDependencies": { "typescript": "^5" } }, "0f39e9401eb7a0a7c906e150127f9829458a79b6"],
 
     "style-mod": ["style-mod@4.1.2", "", {}, "sha512-wnD1HyVqpJUI2+eKZ+eo1UwghftP6yuFheBqqe+bWCotBjC2K1YnteJILRMs3SM4V/0dLEW1SC27MWP5y+mwmw=="],
 
diff --git a/src/compiler/compiler.ts b/src/compiler/compiler.ts
index efcff49..be939cf 100644
--- a/src/compiler/compiler.ts
+++ b/src/compiler/compiler.ts
@@ -54,6 +54,7 @@ export class Compiler {
   fnLabelCount = 0
   ifLabelCount = 0
   tryLabelCount = 0
+  loopLabelCount = 0
   bytecode: Bytecode
   pipeCounter = 0
 
@@ -388,9 +389,7 @@ export class Compiler {
         return instructions
       }
 
-      case terms.ThenBlock:
-      case terms.SingleLineThenBlock:
-      case terms.TryBlock: {
+      case terms.Block: {
         const children = getAllChildren(node)
         const instructions: ProgramItem[] = []
 
@@ -405,6 +404,51 @@ export class Compiler {
         return instructions
       }
 
+      case terms.FunctionCallWithBlock: {
+        const [fn, _colon, ...block] = getAllChildren(node)
+        let instructions: ProgramItem[] = []
+
+        const fnLabel: Label = `.func_${this.fnLabelCount++}`
+        const afterLabel: Label = `.after_${fnLabel}`
+
+        instructions.push(['JUMP', afterLabel])
+        instructions.push([`${fnLabel}:`])
+        instructions.push(
+          ...block.filter(x => x.type.name !== 'keyword')
+            .map(x => this.#compileNode(x!, input))
+            .flat()
+        )
+        instructions.push(['RETURN'])
+        instructions.push([`${afterLabel}:`])
+
+        if (fn?.type.id === terms.FunctionCallOrIdentifier) {
+          instructions.push(['LOAD', input.slice(fn!.from, fn!.to)])
+          instructions.push(['MAKE_FUNCTION', [], fnLabel])
+          instructions.push(['PUSH', 1])
+          instructions.push(['PUSH', 0])
+          instructions.push(['CALL'])
+        } else if (fn?.type.id === terms.FunctionCall) {
+          let body = this.#compileNode(fn!, input)
+          const namedArgCount = (body[body.length - 2]![1] as number) * 2
+          const startSlice = body.length - namedArgCount - 3
+
+          body = [
+            ...body.slice(0, startSlice),
+            ['MAKE_FUNCTION', [], fnLabel],
+            ...body.slice(startSlice)
+          ]
+
+          // @ts-ignore
+          body[body.length - 3]![1] += 1
+          instructions.push(...body)
+
+        } else {
+          throw new Error(`FunctionCallWithBlock: Expected FunctionCallOrIdentifier or FunctionCall`)
+        }
+
+        return instructions
+      }
+
       case terms.TryExpr: {
         const { tryBlock, catchVariable, catchBody, finallyBody } = getTryExprParts(node, input)
 
@@ -629,6 +673,24 @@ export class Compiler {
         return instructions
       }
 
+      case terms.WhileExpr: {
+        const [_while, test, _colon, block] = getAllChildren(node)
+        const instructions: ProgramItem[] = []
+
+        this.loopLabelCount++
+        const startLoop = `.loop_${this.loopLabelCount}:`
+        const endLoop = `.end_loop_${this.loopLabelCount}:`
+
+        instructions.push([`${startLoop}:`])
+        instructions.push(...this.#compileNode(test!, input))
+        instructions.push(['JUMP_IF_FALSE', endLoop])
+        instructions.push(...this.#compileNode(block!, input))
+        instructions.push(['JUMP', startLoop])
+        instructions.push([`${endLoop}:`])
+
+        return instructions
+      }
+
       default:
         throw new CompilerError(
           `Compiler doesn't know how to handle a "${node.type.name}" node.`,
diff --git a/src/compiler/tests/compiler.test.ts b/src/compiler/tests/compiler.test.ts
index 9418f0b..743f738 100644
--- a/src/compiler/tests/compiler.test.ts
+++ b/src/compiler/tests/compiler.test.ts
@@ -154,18 +154,18 @@ describe('compiler', () => {
     end`).toEvaluateTo('white')
   })
 
-  test('if elseif', () => {
+  test('if else if', () => {
     expect(`if false:
       boromir
-    elseif true:
+    else if true:
       frodo
     end`).toEvaluateTo('frodo')
   })
 
-  test('if elseif else', () => {
+  test('if else if else', () => {
     expect(`if false:
       destroyed
-    elseif true:
+    else if true:
       fire
     else:
       darkness
@@ -173,9 +173,9 @@ describe('compiler', () => {
 
     expect(`if false:
       king
-    elseif false:
+    else if false:
       elf
-    elseif true:
+    else if true:
       dwarf
     else:
       scattered
diff --git a/src/compiler/tests/function-blocks.test.ts b/src/compiler/tests/function-blocks.test.ts
new file mode 100644
index 0000000..41bf65d
--- /dev/null
+++ b/src/compiler/tests/function-blocks.test.ts
@@ -0,0 +1,55 @@
+import { expect, describe, test } from 'bun:test'
+
+describe('single line function blocks', () => {
+  test('work with no args', () => {
+    expect(`trap = do x: x end; trap: true end`).toEvaluateTo(true)
+  })
+
+  test('work with one arg', () => {
+    expect(`trap = do x y: [ x (y) ] end; trap EXIT: true end`).toEvaluateTo(['EXIT', true])
+  })
+
+  test('work with named args', () => {
+    expect(`attach = do signal fn: [ signal (fn) ] end; attach signal='exit': true end`).toEvaluateTo(['exit', true])
+  })
+
+
+  test('work with dot-get', () => {
+    expect(`signals = [trap=do x y: [x (y)] end]; signals.trap 'EXIT': true end`).toEvaluateTo(['EXIT', true])
+  })
+})
+
+describe('multi line function blocks', () => {
+  test('work with no args', () => {
+    expect(`
+trap = do x: x end
+trap: 
+  true 
+end`).toEvaluateTo(true)
+  })
+
+  test('work with one arg', () => {
+    expect(`
+trap = do x y: [ x (y) ] end
+trap EXIT: 
+  true
+end`).toEvaluateTo(['EXIT', true])
+  })
+
+  test('work with named args', () => {
+    expect(`
+attach = do signal fn: [ signal (fn) ] end
+attach signal='exit': 
+  true
+end`).toEvaluateTo(['exit', true])
+  })
+
+
+  test('work with dot-get', () => {
+    expect(`
+signals = [trap=do x y: [x (y)] end]
+signals.trap 'EXIT': 
+  true 
+end`).toEvaluateTo(['EXIT', true])
+  })
+})
diff --git a/src/compiler/tests/ribbit.test.ts b/src/compiler/tests/ribbit.test.ts
new file mode 100644
index 0000000..e2bb6c2
--- /dev/null
+++ b/src/compiler/tests/ribbit.test.ts
@@ -0,0 +1,115 @@
+import { expect, describe, test, beforeEach } from 'bun:test'
+
+const buffer: string[] = []
+
+const ribbitGlobals = {
+  ribbit: async (cb: Function) => {
+    await cb()
+    return buffer.join("\n")
+  },
+  tag: async (tagFn: Function, atDefaults = {}) => {
+    return (atNamed = {}, ...args: any[]) => tagFn(Object.assign({}, atDefaults, atNamed), ...args)
+  },
+  head: (atNamed: {}, ...args: any[]) => tag('head', atNamed, ...args),
+  title: (atNamed: {}, ...args: any[]) => tag('title', atNamed, ...args),
+  meta: (atNamed: {}, ...args: any[]) => tag('meta', atNamed, ...args),
+  p: (atNamed: {}, ...args: any[]) => tag('p', atNamed, ...args),
+  h1: (atNamed: {}, ...args: any[]) => tag('h1', atNamed, ...args),
+  h2: (atNamed: {}, ...args: any[]) => tag('h2', atNamed, ...args),
+  b: (atNamed: {}, ...args: any[]) => tag('b', atNamed, ...args),
+  ul: (atNamed: {}, ...args: any[]) => tag('ul', atNamed, ...args),
+  li: (atNamed: {}, ...args: any[]) => tag('li', atNamed, ...args),
+  nospace: () => NOSPACE_TOKEN,
+  echo: (...args: any[]) => console.log(...args)
+}
+
+function raw(fn: Function) { (fn as any).raw = true }
+
+const tagBlock = async (tagName: string, props = {}, fn: Function) => {
+  const attrs = Object.entries(props).map(([key, value]) => `${key}="${value}"`)
+  const space = attrs.length ? ' ' : ''
+
+  buffer.push(`<${tagName}${space}${attrs.join(' ')}>`)
+  await fn()
+  buffer.push(`</${tagName}>`)
+}
+
+const tagCall = (tagName: string, atNamed = {}, ...args: any[]) => {
+  const attrs = Object.entries(atNamed).map(([key, value]) => `${key}="${value}"`)
+  const space = attrs.length ? ' ' : ''
+  const children = args
+    .reverse()
+    .map(a => a === TAG_TOKEN ? buffer.pop() : a)
+    .reverse().join(' ')
+    .replaceAll(` ${NOSPACE_TOKEN} `, '')
+
+  if (SELF_CLOSING.includes(tagName))
+    buffer.push(`<${tagName}${space}${attrs.join(' ')} />`)
+  else
+    buffer.push(`<${tagName}${space}${attrs.join(' ')}>${children}</${tagName}>`)
+}
+
+const tag = async (tagName: string, atNamed = {}, ...args: any[]) => {
+  if (typeof args[0] === 'function') {
+    await tagBlock(tagName, atNamed, args[0])
+  } else {
+    tagCall(tagName, atNamed, ...args)
+    return TAG_TOKEN
+  }
+}
+
+const NOSPACE_TOKEN = '!!ribbit-nospace!!'
+const TAG_TOKEN = '!!ribbit-tag!!'
+const SELF_CLOSING = ["area", "base", "br", "col", "embed", "hr", "img", "input", "link", "meta", "param", "source", "track", "wbr"]
+
+describe('ribbit', () => {
+  beforeEach(() => buffer.length = 0)
+
+  test('head tag', () => {
+    expect(`
+ribbit:
+  head:
+    title What up
+    meta charset=UTF-8
+    meta name=viewport content='width=device-width, initial-scale=1, viewport-fit=cover'
+  end
+end
+  `).toEvaluateTo(`<head>
+<title>What up</title>
+<meta charset="UTF-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
+</head>`, ribbitGlobals)
+  })
+
+  test('custom tags', () => {
+    expect(`
+list = tag ul class=list
+ribbit:
+  list:
+    li border-bottom='1px solid black' one
+    li two
+    li three
+  end
+end`).toEvaluateTo(`<ul class="list">
+<li border-bottom="1px solid black">one</li>
+<li>two</li>
+<li>three</li>
+</ul>`, ribbitGlobals)
+  })
+
+  test('inline expressions', () => {
+    expect(`
+  ribbit:      
+    p class=container:
+      h1 class=bright style='font-family: helvetica' Heya
+      h2 man that is (b wild) (nospace) !
+      p Double the fun.
+    end
+  end`).toEvaluateTo(
+      `<p class="container">
+<h1 class="bright" style="font-family: helvetica">Heya</h1>
+<h2>man that is <b>wild</b>!</h2>
+<p>Double the fun.</p>
+</p>`, ribbitGlobals)
+  })
+})
\ No newline at end of file
diff --git a/src/compiler/tests/while.test.ts b/src/compiler/tests/while.test.ts
new file mode 100644
index 0000000..c3afdb9
--- /dev/null
+++ b/src/compiler/tests/while.test.ts
@@ -0,0 +1,48 @@
+import { describe } from 'bun:test'
+import { expect, test } from 'bun:test'
+
+describe('while', () => {
+  test('basic variable', () => {
+    expect(`
+      a = true
+      b = ''
+      while a: 
+        a = false
+        b = done
+      end
+      b`)
+      .toEvaluateTo('done')
+  })
+
+  test('basic expression', () => {
+    expect(`
+      a = 0
+      while a < 10: 
+        a += 1
+      end
+      a`)
+      .toEvaluateTo(10)
+  })
+
+  test('compound expression', () => {
+    expect(`
+      a = 1
+      b = 0
+      while a > 0 and b < 100:  
+        b += 1
+      end
+      b`)
+      .toEvaluateTo(100)
+  })
+
+  test('returns value', () => {
+    expect(`
+      a = 0
+      ret = while a < 10: 
+        a += 1
+        done
+      end
+      ret`)
+      .toEvaluateTo('done')
+  })
+})
\ No newline at end of file
diff --git a/src/compiler/utils.ts b/src/compiler/utils.ts
index 6151563..ed0dfcc 100644
--- a/src/compiler/utils.ts
+++ b/src/compiler/utils.ts
@@ -210,7 +210,7 @@ export const getIfExprParts = (node: SyntaxNode, input: string) => {
       }
       elseThenBlock = parts.at(-1)
     } else if (child.type.id === terms.ElseIfExpr) {
-      const [_keyword, conditional, _colon, thenBlock] = parts
+      const [_else, _if, conditional, _colon, thenBlock] = parts
       if (!conditional || !thenBlock) {
         const names = parts.map((p) => p.type.name).join(', ')
         const message = `ElseIfExpr expected conditional and thenBlock, got ${names}`
@@ -309,7 +309,7 @@ export const getDotGetParts = (node: SyntaxNode, input: string) => {
 export const getTryExprParts = (node: SyntaxNode, input: string) => {
   const children = getAllChildren(node)
 
-  // First child is always 'try' keyword, second is colon, third is TryBlock or statement
+  // First child is always 'try' keyword, second is colon, third is Block
   const [tryKeyword, _colon, tryBlock, ...rest] = children
 
   if (!tryKeyword || !tryBlock) {
diff --git a/src/parser/shrimp.grammar b/src/parser/shrimp.grammar
index a3daaf4..01f95b6 100644
--- a/src/parser/shrimp.grammar
+++ b/src/parser/shrimp.grammar
@@ -25,9 +25,18 @@
   Underscore { "_" }
   Regex { "//" (![/\\\n[] | "\\" ![\n] | "[" (![\n\\\]] | "\\" ![\n])* "]")+ ("//" $[gimsuy]*)? } // Stolen from the lezer JavaScript grammar
   "|"[@name=operator]
-
 }
 
+end { @specialize[@name=keyword]<Identifier, "end"> }
+while { @specialize[@name=keyword]<Identifier, "while"> }
+if { @specialize[@name=keyword]<Identifier, "if"> }
+else { @specialize[@name=keyword]<Identifier, "else"> }
+try { @specialize[@name=keyword]<Identifier, "try"> }
+catch { @specialize[@name=keyword]<Identifier, "catch"> }
+finally { @specialize[@name=keyword]<Identifier, "finally"> }
+throw { @specialize[@name=keyword]<Identifier, "throw"> }
+null { @specialize[@name=Null]<Identifier, "null"> }
+
 @external tokens tokenizer from "./tokenizer" { Identifier, AssignableIdentifier, Word, IdentifierBeforeDot }
 @external specialize {Identifier} specializeKeyword from "./tokenizer" { Do }
 
@@ -47,9 +56,10 @@ item {
   newlineOrSemicolon // allow blank lines
 }
 
-
 consumeToTerminator {
   PipeExpr |
+  WhileExpr |
+  FunctionCallWithBlock |
   ambiguousFunctionCall |
   TryExpr |
   Throw |
@@ -70,6 +80,18 @@ pipeOperand {
   FunctionCall | FunctionCallOrIdentifier
 }
 
+WhileExpr {
+  while (ConditionalOp | expression) colon Block end
+}
+
+Block {
+  consumeToTerminator | newlineOrSemicolon block
+}
+
+FunctionCallWithBlock {
+  ambiguousFunctionCall colon Block CatchExpr? FinallyExpr? end
+}
+
 FunctionCallOrIdentifier {
   DotGet | Identifier
 }
@@ -86,7 +108,6 @@ arg {
   PositionalArg | NamedArg
 }
 
-
 PositionalArg {
   expression | FunctionDef | Underscore
 }
@@ -96,71 +117,35 @@ NamedArg {
 }
 
 FunctionDef {
-  singleLineFunctionDef | multilineFunctionDef
-}
-
-singleLineFunctionDef {
-  Do Params colon consumeToTerminator CatchExpr? FinallyExpr? @specialize[@name=keyword]<Identifier, "end">
-}
-
-multilineFunctionDef {
-  Do Params colon newlineOrSemicolon block CatchExpr? FinallyExpr? @specialize[@name=keyword]<Identifier, "end">
+  Do Params colon (consumeToTerminator | newlineOrSemicolon block) CatchExpr? FinallyExpr? end
 }
 
 IfExpr {
-  singleLineIf | multilineIf
-}
-
-singleLineIf {
-  @specialize[@name=keyword]<Identifier, "if"> (ConditionalOp | expression) colon SingleLineThenBlock @specialize[@name=keyword]<Identifier, "end">
-}
-
-multilineIf {
-  @specialize[@name=keyword]<Identifier, "if"> (ConditionalOp | expression) colon newlineOrSemicolon ThenBlock ElseIfExpr* ElseExpr? @specialize[@name=keyword]<Identifier, "end">
+  if (ConditionalOp | expression) colon Block ElseIfExpr* ElseExpr? end
 }
 
 ElseIfExpr {
-  @specialize[@name=keyword]<Identifier, "elseif"> (ConditionalOp | expression) colon newlineOrSemicolon ThenBlock
+  else if (ConditionalOp | expression) colon Block
 }
 
 ElseExpr {
-  @specialize[@name=keyword]<Identifier, "else"> colon newlineOrSemicolon ThenBlock
-}
-
-ThenBlock {
-  block
-}
-
-SingleLineThenBlock {
-  consumeToTerminator
+  else colon Block
 }
 
 TryExpr {
-  singleLineTry | multilineTry
-}
-
-singleLineTry {
-  @specialize[@name=keyword]<Identifier, "try"> colon consumeToTerminator CatchExpr? FinallyExpr? @specialize[@name=keyword]<Identifier, "end">
-}
-
-multilineTry {
-  @specialize[@name=keyword]<Identifier, "try"> colon newlineOrSemicolon TryBlock CatchExpr? FinallyExpr? @specialize[@name=keyword]<Identifier, "end">
+  try colon Block CatchExpr? FinallyExpr? end
 }
 
 CatchExpr {
-  @specialize[@name=keyword]<Identifier, "catch"> Identifier colon (newlineOrSemicolon TryBlock | consumeToTerminator)
+  catch Identifier colon Block
 }
 
 FinallyExpr {
-  @specialize[@name=keyword]<Identifier, "finally"> colon (newlineOrSemicolon TryBlock | consumeToTerminator)
-}
-
-TryBlock {
-  block
+  finally colon Block
 }
 
 Throw {
-  @specialize[@name=keyword]<Identifier, "throw"> (BinOp | ConditionalOp | expression)
+  throw (BinOp | ConditionalOp | expression)
 }
 
 ConditionalOp {
@@ -179,7 +164,7 @@ Params {
 }
 
 NamedParam {
-  NamedArgPrefix (String | Number | Boolean | @specialize[@name=Null]<Identifier, "null">)
+  NamedArgPrefix (String | Number | Boolean | null)
 }
 
 Assign {
@@ -217,7 +202,6 @@ expression {
   }
 
   String { "'" stringContent* "'" }
-
 }
 
 stringContent {
@@ -253,7 +237,7 @@ Array {
 // to go through ambiguousFunctionCall (which is what we want semantically).
 // Yes, it is annoying and I gave up trying to use GLR to fix it.
 expressionWithoutIdentifier {
-  ParenExpr | Word | String | Number | Boolean | Regex | Dict | Array | @specialize[@name=Null]<Identifier, "null">
+  ParenExpr | Word | String | Number | Boolean | Regex | Dict | Array | null
 }
 
 block {
diff --git a/src/parser/shrimp.terms.ts b/src/parser/shrimp.terms.ts
index 07b57b4..05f3d5a 100644
--- a/src/parser/shrimp.terms.ts
+++ b/src/parser/shrimp.terms.ts
@@ -47,19 +47,19 @@ export const
   Null = 45,
   colon = 46,
   CatchExpr = 47,
-  keyword = 69,
-  TryBlock = 49,
+  keyword = 68,
+  Block = 49,
   FinallyExpr = 50,
   Underscore = 53,
   Array = 54,
   ConditionalOp = 55,
   PositionalArg = 56,
-  TryExpr = 58,
-  Throw = 60,
-  IfExpr = 62,
-  SingleLineThenBlock = 64,
-  ThenBlock = 65,
-  ElseIfExpr = 66,
-  ElseExpr = 68,
+  WhileExpr = 58,
+  FunctionCallWithBlock = 60,
+  TryExpr = 61,
+  Throw = 63,
+  IfExpr = 65,
+  ElseIfExpr = 67,
+  ElseExpr = 69,
   CompoundAssign = 70,
   Assign = 71
diff --git a/src/parser/shrimp.ts b/src/parser/shrimp.ts
index 0877626..5afc5d8 100644
--- a/src/parser/shrimp.ts
+++ b/src/parser/shrimp.ts
@@ -4,14 +4,14 @@ import {operatorTokenizer} from "./operatorTokenizer"
 import {tokenizer, specializeKeyword} from "./tokenizer"
 import {trackScope} from "./scopeTracker"
 import {highlighting} from "./highlight"
-const spec_Identifier = {__proto__:null,null:90, catch:96, finally:102, end:104, try:118, throw:122, if:126, elseif:134, else:138}
+const spec_Identifier = {__proto__:null,null:90, catch:96, finally:102, end:104, while:118, try:124, throw:128, if:132, else:136}
 export const parser = LRParser.deserialize({
   version: 14,
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+  nodeNames: "⚠ Star Slash Plus Minus And Or Eq EqEq Neq Lt Lte Gt Gte Modulo PlusEq MinusEq StarEq SlashEq ModuloEq Identifier AssignableIdentifier Word IdentifierBeforeDot Do Program PipeExpr FunctionCall DotGet Number ParenExpr FunctionCallOrIdentifier BinOp String StringFragment Interpolation EscapeSeq Boolean Regex Dict NamedArg NamedArgPrefix FunctionDef Params NamedParam Null colon CatchExpr keyword Block FinallyExpr keyword keyword Underscore Array ConditionalOp PositionalArg operator WhileExpr keyword FunctionCallWithBlock TryExpr keyword Throw keyword IfExpr keyword ElseIfExpr keyword ElseExpr CompoundAssign Assign",
+  maxTerm: 108,
   context: trackScope,
   nodeProps: [
     ["closedBy", 46,"end"]
@@ -19,9 +19,9 @@ export const parser = LRParser.deserialize({
   propSources: [highlighting],
   skippedNodes: [0],
   repeatNodeCount: 11,
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+  tokenData: "C_~R|OX#{XY$jYZ%TZp#{pq$jqs#{st%ntu'Vuw#{wx'[xy'ayz'zz{#{{|(e|}#{}!O+X!O!P#{!P!Q-n!Q![)S![!]6Z!]!^%T!^!}#{!}#O6t#O#P8j#P#Q8o#Q#R#{#R#S9Y#S#T#{#T#Y,Y#Y#Z9s#Z#b,Y#b#c>q#c#f,Y#f#g?n#g#h,Y#h#i@k#i#o,Y#o#p#{#p#qBo#q;'S#{;'S;=`$d<%l~#{~O#{~~CYS$QUrSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{S$gP;=`<%l#{^$qUrS!wYOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U%[UrS#ZQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{^%uZrS!xYOY%nYZ#{Zt%ntu&huw%nwx&hx#O%n#O#P&h#P;'S%n;'S;=`'P<%lO%nY&mS!xYOY&hZ;'S&h;'S;=`&y<%lO&hY&|P;=`<%l&h^'SP;=`<%l%n~'[O#S~~'aO#Q~U'hUrS!}QOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U(RUrS#^QOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U(jWrSOt#{uw#{x!Q#{!Q![)S![#O#{#P;'S#{;'S;=`$d<%lO#{U)ZYrSmQOt#{uw#{x!O#{!O!P)y!P!Q#{!Q![)S![#O#{#P;'S#{;'S;=`$d<%lO#{U*OWrSOt#{uw#{x!Q#{!Q![*h![#O#{#P;'S#{;'S;=`$d<%lO#{U*oWrSmQOt#{uw#{x!Q#{!Q![*h![#O#{#P;'S#{;'S;=`$d<%lO#{U+^^rSOt#{uw#{x}#{}!O,Y!O!Q#{!Q![)S![!_#{!_!`-T!`#O#{#P#T#{#T#o,Y#o;'S#{;'S;=`$d<%lO#{U,_[rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#o,Y#o;'S#{;'S;=`$d<%lO#{U-[UyQrSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U-sWrSOt#{uw#{x!P#{!P!Q.]!Q#O#{#P;'S#{;'S;=`$d<%lO#{U.b^rSOY/^YZ#{Zt/^tu0auw/^wx0ax!P/^!P!Q#{!Q!}/^!}#O5S#O#P2o#P;'S/^;'S;=`6T<%lO/^U/e^rSvQOY/^YZ#{Zt/^tu0auw/^wx0ax!P/^!P!Q3U!Q!}/^!}#O5S#O#P2o#P;'S/^;'S;=`6T<%lO/^Q0fXvQOY0aZ!P0a!P!Q1R!Q!}0a!}#O1p#O#P2o#P;'S0a;'S;=`3O<%lO0aQ1UP!P!Q1XQ1^UvQ#Z#[1X#]#^1X#a#b1X#g#h1X#i#j1X#m#n1XQ1sVOY1pZ#O1p#O#P2Y#P#Q0a#Q;'S1p;'S;=`2i<%lO1pQ2]SOY1pZ;'S1p;'S;=`2i<%lO1pQ2lP;=`<%l1pQ2rSOY0aZ;'S0a;'S;=`3O<%lO0aQ3RP;=`<%l0aU3ZWrSOt#{uw#{x!P#{!P!Q3s!Q#O#{#P;'S#{;'S;=`$d<%lO#{U3zbrSvQOt#{uw#{x#O#{#P#Z#{#Z#[3s#[#]#{#]#^3s#^#a#{#a#b3s#b#g#{#g#h3s#h#i#{#i#j3s#j#m#{#m#n3s#n;'S#{;'S;=`$d<%lO#{U5X[rSOY5SYZ#{Zt5Stu1puw5Swx1px#O5S#O#P2Y#P#Q/^#Q;'S5S;'S;=`5}<%lO5SU6QP;=`<%l5SU6WP;=`<%l/^U6bUrS!OQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U6{W#YQrSOt#{uw#{x!_#{!_!`7e!`#O#{#P;'S#{;'S;=`$d<%lO#{U7jVrSOt#{uw#{x#O#{#P#Q8P#Q;'S#{;'S;=`$d<%lO#{U8WU#XQrSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{~8oO#T~U8vU#]QrSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U9aUrS!VQOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{U9x]rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#U:q#U#o,Y#o;'S#{;'S;=`$d<%lO#{U:v^rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#`,Y#`#a;r#a#o,Y#o;'S#{;'S;=`$d<%lO#{U;w^rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#g,Y#g#h<s#h#o,Y#o;'S#{;'S;=`$d<%lO#{U<x^rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#X,Y#X#Y=t#Y#o,Y#o;'S#{;'S;=`$d<%lO#{U={[uQrSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#o,Y#o;'S#{;'S;=`$d<%lO#{^>x[#UWrSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#o,Y#o;'S#{;'S;=`$d<%lO#{^?u[#WWrSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#o,Y#o;'S#{;'S;=`$d<%lO#{^@r^#VWrSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#f,Y#f#gAn#g#o,Y#o;'S#{;'S;=`$d<%lO#{UAs^rSOt#{uw#{x}#{}!O,Y!O!_#{!_!`-T!`#O#{#P#T#{#T#i,Y#i#j<s#j#o,Y#o;'S#{;'S;=`$d<%lO#{UBvU!ZQrSOt#{uw#{x#O#{#P;'S#{;'S;=`$d<%lO#{~C_O#`~",
   tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO!|~~", 11)],
   topRules: {"Program":[0,25]},
   specialized: [{term: 20, get: (value: any, stack: any) => (specializeKeyword(value, stack) << 1), external: specializeKeyword},{term: 20, get: (value: keyof typeof spec_Identifier) => spec_Identifier[value] || -1}],
-  tokenPrec: 1619
+  tokenPrec: 1578
 })
diff --git a/src/parser/tests/basics.test.ts b/src/parser/tests/basics.test.ts
index d890f91..b4092a9 100644
--- a/src/parser/tests/basics.test.ts
+++ b/src/parser/tests/basics.test.ts
@@ -752,7 +752,7 @@ Assign
           EqEq ==
           Number 5
       colon :
-      ThenBlock
+      Block
         Boolean true
       keyword end
     keyword end
@@ -794,7 +794,7 @@ Assign
           EqEq ==
           Number 5
       colon :
-      ThenBlock
+      Block
         Boolean true
       keyword end
     keyword end
diff --git a/src/parser/tests/control-flow.test.ts b/src/parser/tests/control-flow.test.ts
index 70efddb..af0f704 100644
--- a/src/parser/tests/control-flow.test.ts
+++ b/src/parser/tests/control-flow.test.ts
@@ -2,7 +2,7 @@ import { expect, describe, test } from 'bun:test'
 
 import '../shrimp.grammar' // Importing this so changes cause it to retest!
 
-describe('if/elseif/else', () => {
+describe('if/else if/else', () => {
   test('parses single line if', () => {
     expect(`if y == 1: 'cool' end`).toMatchTree(`
       IfExpr
@@ -12,7 +12,7 @@ describe('if/elseif/else', () => {
           EqEq ==
           Number 1
         colon :
-        SingleLineThenBlock
+        Block
           String
             StringFragment cool
         keyword end
@@ -26,7 +26,7 @@ describe('if/elseif/else', () => {
           keyword if
           Identifier x
           colon :
-          SingleLineThenBlock
+          Block
             Number 2
           keyword end
     `)
@@ -44,7 +44,7 @@ describe('if/elseif/else', () => {
           Lt <
           Number 9
         colon :
-        ThenBlock
+        Block
           FunctionCallOrIdentifier
             Identifier yes
         keyword end
@@ -61,78 +61,81 @@ describe('if/elseif/else', () => {
         keyword if
         Identifier with-else
         colon :
-        ThenBlock
+        Block
           FunctionCallOrIdentifier
             Identifier x
         ElseExpr
           keyword else
           colon :
-          ThenBlock
+          Block
             FunctionCallOrIdentifier
               Identifier y
         keyword end
     `)
   })
 
-  test('parses multiline if with elseif', () => {
-    expect(`if with-elseif:
+  test('parses multiline if with else if', () => {
+    expect(`if with-else-if:
       x
-    elseif another-condition:
+    else if another-condition:
       y
     end`).toMatchTree(`
       IfExpr
         keyword if
-        Identifier with-elseif
+        Identifier with-else-if
         colon :
-        ThenBlock
+        Block
           FunctionCallOrIdentifier
             Identifier x
         ElseIfExpr
-          keyword elseif
+          keyword else
+          keyword if
           Identifier another-condition
           colon :
-          ThenBlock
+          Block
             FunctionCallOrIdentifier
               Identifier y
         keyword end
     `)
   })
 
-  test('parses multiline if with multiple elseif and else', () => {
-    expect(`if with-elseif-else:
+  test('parses multiline if with multiple else if and else', () => {
+    expect(`if with-else-if-else:
       x
-    elseif another-condition:
+    else if another-condition:
       y
-    elseif yet-another-condition:
+    else if yet-another-condition:
       z
     else:
       oh-no
     end`).toMatchTree(`
       IfExpr
         keyword if
-        Identifier with-elseif-else
+        Identifier with-else-if-else
         colon :
-        ThenBlock
+        Block
           FunctionCallOrIdentifier
             Identifier x
         ElseIfExpr
-          keyword elseif
+          keyword else
+          keyword if
           Identifier another-condition
           colon :
-          ThenBlock
+          Block
             FunctionCallOrIdentifier
               Identifier y
         ElseIfExpr
-          keyword elseif
+          keyword else
+          keyword if
           Identifier yet-another-condition
           colon :
-          ThenBlock
+          Block
             FunctionCallOrIdentifier
               Identifier z
         ElseExpr
           keyword else
           colon :
-          ThenBlock
+          Block
             FunctionCallOrIdentifier
               Identifier oh-no
         keyword end
@@ -148,9 +151,124 @@ describe('if/elseif/else', () => {
           keyword if
           Boolean true
           colon :
-          SingleLineThenBlock
+          Block
             Number 2
           keyword end
     `)
   })
 })
+
+describe('while', () => {
+  test('infinite loop', () => {
+    expect(`while true: true end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    Boolean true
+    colon :
+    Block
+      Boolean true
+    keyword end`)
+  })
+
+  test('basic expression', () => {
+    expect(`while a > 0: true end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    ConditionalOp
+      Identifier a
+      Gt >
+      Number 0
+    colon :
+    Block
+      Boolean true
+    keyword end`)
+  })
+
+
+  test('compound expression', () => {
+    expect(`while a > 0 and b < 100 and c < 1000: true end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    ConditionalOp
+      ConditionalOp
+        ConditionalOp
+          Identifier a
+          Gt >
+          Number 0
+        And and
+        ConditionalOp
+          Identifier b
+          Lt <
+          Number 100
+      And and
+      ConditionalOp
+        Identifier c
+        Lt <
+        Number 1000
+    colon :
+    Block
+      Boolean true
+    keyword end`)
+  })
+
+  test('multiline infinite loop', () => {
+    expect(`
+      while true: 
+        true 
+      end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    Boolean true
+    colon :
+    Block
+      Boolean true
+    keyword end`)
+  })
+
+  test('multiline basic expression', () => {
+    expect(`
+      while a > 0: 
+        true
+      end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    ConditionalOp
+      Identifier a
+      Gt >
+      Number 0
+    colon :
+    Block
+      Boolean true
+    keyword end`)
+  })
+
+
+  test('multiline compound expression', () => {
+    expect(`
+      while a > 0 and b < 100 and c < 1000: 
+        true 
+      end`).toMatchTree(`
+  WhileExpr
+    keyword while
+    ConditionalOp
+      ConditionalOp
+        ConditionalOp
+          Identifier a
+          Gt >
+          Number 0
+        And and
+        ConditionalOp
+          Identifier b
+          Lt <
+          Number 100
+      And and
+      ConditionalOp
+        Identifier c
+        Lt <
+        Number 1000
+    colon :
+    Block
+      Boolean true
+    keyword end`)
+  })
+})
\ No newline at end of file
diff --git a/src/parser/tests/exceptions.test.ts b/src/parser/tests/exceptions.test.ts
index 039a279..e89c80e 100644
--- a/src/parser/tests/exceptions.test.ts
+++ b/src/parser/tests/exceptions.test.ts
@@ -12,14 +12,14 @@ describe('try/catch/finally/throw', () => {
       TryExpr
         keyword try
         colon :
-        TryBlock
+        Block
           FunctionCallOrIdentifier
             Identifier risky-operation
         CatchExpr
           keyword catch
           Identifier err
           colon :
-          TryBlock
+          Block
             FunctionCall
               Identifier handle-error
               PositionalArg
@@ -37,13 +37,13 @@ describe('try/catch/finally/throw', () => {
       TryExpr
         keyword try
         colon :
-        TryBlock
+        Block
           FunctionCallOrIdentifier
             Identifier do-work
         FinallyExpr
           keyword finally
           colon :
-          TryBlock
+          Block
             FunctionCallOrIdentifier
               Identifier cleanup
         keyword end
@@ -61,14 +61,14 @@ describe('try/catch/finally/throw', () => {
       TryExpr
         keyword try
         colon :
-        TryBlock
+        Block
           FunctionCallOrIdentifier
             Identifier risky-operation
         CatchExpr
           keyword catch
           Identifier err
           colon :
-          TryBlock
+          Block
             FunctionCall
               Identifier handle-error
               PositionalArg
@@ -76,7 +76,7 @@ describe('try/catch/finally/throw', () => {
         FinallyExpr
           keyword finally
           colon :
-          TryBlock
+          Block
             FunctionCallOrIdentifier
               Identifier cleanup
         keyword end
@@ -91,15 +91,17 @@ describe('try/catch/finally/throw', () => {
         TryExpr
           keyword try
           colon :
-          FunctionCall
-            Identifier parse-number
-            PositionalArg
-              Identifier input
+          Block
+            FunctionCall
+              Identifier parse-number
+              PositionalArg
+                Identifier input
           CatchExpr
             keyword catch
             Identifier err
             colon :
-            Number 0
+            Block
+              Number 0
           keyword end
     `)
   })
@@ -109,18 +111,21 @@ describe('try/catch/finally/throw', () => {
       TryExpr
         keyword try
         colon :
-        FunctionCallOrIdentifier
-          Identifier work
+        Block
+          FunctionCallOrIdentifier
+            Identifier work
         CatchExpr
           keyword catch
           Identifier err
           colon :
-          Number 0
+          Block
+            Number 0
         FinallyExpr
           keyword finally
           colon :
-          FunctionCallOrIdentifier
-            Identifier cleanup
+          Block
+            FunctionCallOrIdentifier
+              Identifier cleanup
         keyword end
     `)
   })
@@ -164,13 +169,15 @@ describe('try/catch/finally/throw', () => {
         TryExpr
           keyword try
           colon :
-          FunctionCallOrIdentifier
-            Identifier work
+          Block
+            FunctionCallOrIdentifier
+              Identifier work
           CatchExpr
             keyword catch
             Identifier err
             colon :
-            Number 0
+            Block
+              Number 0
           keyword end
     `)
   })
@@ -199,7 +206,7 @@ describe('function-level exception handling', () => {
             keyword catch
             Identifier e
             colon :
-            TryBlock
+            Block
               FunctionCallOrIdentifier
                 Identifier empty-string
           keyword end
@@ -227,7 +234,7 @@ describe('function-level exception handling', () => {
           FinallyExpr
             keyword finally
             colon :
-            TryBlock
+            Block
               FunctionCallOrIdentifier
                 Identifier close-resources
           keyword end
@@ -259,7 +266,7 @@ describe('function-level exception handling', () => {
             keyword catch
             Identifier err
             colon :
-            TryBlock
+            Block
               FunctionCall
                 Identifier log
                 PositionalArg
@@ -269,7 +276,7 @@ describe('function-level exception handling', () => {
           FinallyExpr
             keyword finally
             colon :
-            TryBlock
+            Block
               FunctionCallOrIdentifier
                 Identifier cleanup
           keyword end
diff --git a/src/parser/tests/function-blocks.test.ts b/src/parser/tests/function-blocks.test.ts
new file mode 100644
index 0000000..80805a9
--- /dev/null
+++ b/src/parser/tests/function-blocks.test.ts
@@ -0,0 +1,303 @@
+import { expect, describe, test } from 'bun:test'
+
+import '../shrimp.grammar' // Importing this so changes cause it to retest!
+
+describe('single line function blocks', () => {
+  test('work with no args', () => {
+    expect(`trap: echo bye bye end`).toMatchTree(`
+  FunctionCallWithBlock
+    FunctionCallOrIdentifier
+      Identifier trap
+    colon :
+    Block
+      FunctionCall
+        Identifier echo
+        PositionalArg
+          Identifier bye
+        PositionalArg
+          Identifier bye
+    keyword end`
+    )
+  })
+
+  test('work with one arg', () => {
+    expect(`trap EXIT: echo bye bye end`).toMatchTree(`
+  FunctionCallWithBlock
+    FunctionCall
+      Identifier trap
+      PositionalArg
+        Word EXIT
+    colon :
+    Block
+      FunctionCall
+        Identifier echo
+        PositionalArg
+          Identifier bye
+        PositionalArg
+          Identifier bye
+    keyword end`
+    )
+  })
+
+  test('work with named args', () => {
+    expect(`attach signal='exit': echo bye bye end`).toMatchTree(`
+  FunctionCallWithBlock
+    FunctionCall
+      Identifier attach
+      NamedArg
+        NamedArgPrefix signal=
+        String
+          StringFragment exit
+    colon :
+    Block
+      FunctionCall
+        Identifier echo
+        PositionalArg
+          Identifier bye
+        PositionalArg
+          Identifier bye
+    keyword end`
+    )
+  })
+
+
+  test('work with dot-get', () => {
+    expect(`signals = [=]; signals.trap 'EXIT': echo bye bye end`).toMatchTree(`
+    Assign
+      AssignableIdentifier signals
+      Eq =
+      Dict [=]
+    FunctionCallWithBlock
+      FunctionCall
+        DotGet
+          IdentifierBeforeDot signals
+          Identifier trap
+        PositionalArg
+          String
+            StringFragment EXIT
+      colon :
+      Block
+        FunctionCall
+          Identifier echo
+          PositionalArg
+            Identifier bye
+          PositionalArg
+            Identifier bye
+      keyword end`
+    )
+  })
+})
+
+describe('multi line function blocks', () => {
+  test('work with no args', () => {
+    expect(`
+trap: 
+  echo bye bye 
+end
+`).toMatchTree(`
+  FunctionCallWithBlock
+    FunctionCallOrIdentifier
+      Identifier trap
+    colon :
+    Block
+      FunctionCall
+        Identifier echo
+        PositionalArg
+          Identifier bye
+        PositionalArg
+          Identifier bye
+    keyword end`
+    )
+  })
+
+  test('work with one arg', () => {
+    expect(`
+trap EXIT: 
+  echo bye bye 
+end`).toMatchTree(`
+  FunctionCallWithBlock
+    FunctionCall
+      Identifier trap
+      PositionalArg
+        Word EXIT
+    colon :
+    Block
+      FunctionCall
+        Identifier echo
+        PositionalArg
+          Identifier bye
+        PositionalArg
+          Identifier bye
+    keyword end`
+    )
+  })
+
+  test('work with named args', () => {
+    expect(`
+attach signal='exit' code=1:
+  echo bye bye 
+end`).toMatchTree(`
+  FunctionCallWithBlock
+    FunctionCall
+      Identifier attach
+      NamedArg
+        NamedArgPrefix signal=
+        String
+          StringFragment exit
+      NamedArg
+        NamedArgPrefix code=
+        Number 1
+    colon :
+    Block
+      FunctionCall
+        Identifier echo
+        PositionalArg
+          Identifier bye
+        PositionalArg
+          Identifier bye
+    keyword end`
+    )
+  })
+
+
+  test('work with dot-get', () => {
+    expect(`
+signals = [=]
+signals.trap 'EXIT': 
+  echo bye bye 
+end`).toMatchTree(`
+    Assign
+      AssignableIdentifier signals
+      Eq =
+      Dict [=]
+    FunctionCallWithBlock
+      FunctionCall
+        DotGet
+          IdentifierBeforeDot signals
+          Identifier trap
+        PositionalArg
+          String
+            StringFragment EXIT
+      colon :
+      Block
+        FunctionCall
+          Identifier echo
+          PositionalArg
+            Identifier bye
+          PositionalArg
+            Identifier bye
+      keyword end`
+    )
+  })
+})
+
+describe('ribbit', () => {
+  test('head tag', () => {
+    expect(`
+head:
+  title What up
+  meta charSet=UTF-8
+  meta name='viewport' content='width=device-width, initial-scale=1, viewport-fit=cover'
+end`).toMatchTree(`
+  FunctionCallWithBlock
+    FunctionCallOrIdentifier
+      Identifier head
+    colon :
+    Block
+      FunctionCall
+        Identifier title
+        PositionalArg
+          Word What
+        PositionalArg
+          Identifier up
+      FunctionCall
+        Identifier meta
+        PositionalArg
+          Word charSet=UTF-8
+      FunctionCall
+        Identifier meta
+        NamedArg
+          NamedArgPrefix name=
+          String
+            StringFragment viewport
+        NamedArg
+          NamedArgPrefix content=
+          String
+            StringFragment width=device-width, initial-scale=1, viewport-fit=cover
+    keyword end
+  `)
+  })
+
+  test('li', () => {
+    expect(`
+list:
+  li border-bottom='1px solid black' one
+  li two
+  li three
+end`).toMatchTree(`
+  FunctionCallWithBlock
+    FunctionCallOrIdentifier
+      Identifier list
+    colon :
+    Block
+      FunctionCall
+        Identifier li
+        NamedArg
+          NamedArgPrefix border-bottom=
+          String
+            StringFragment 1px solid black
+        PositionalArg
+          Identifier one
+      FunctionCall
+        Identifier li
+        PositionalArg
+          Identifier two
+      FunctionCall
+        Identifier li
+        PositionalArg
+          Identifier three
+    keyword end`)
+  })
+
+  test('inline expressions', () => {
+    expect(`
+p:
+  h1 class=bright style='font-family: helvetica' Heya
+  h2 man that is (b wild)!
+end`)
+      .toMatchTree(`
+  FunctionCallWithBlock
+    FunctionCallOrIdentifier
+      Identifier p
+    colon :
+    Block
+      FunctionCall
+        Identifier h1
+        NamedArg
+          NamedArgPrefix class=
+          Identifier bright
+        NamedArg
+          NamedArgPrefix style=
+          String
+            StringFragment font-family: helvetica
+        PositionalArg
+          Word Heya
+      FunctionCall
+        Identifier h2
+        PositionalArg
+          Identifier man
+        PositionalArg
+          Identifier that
+        PositionalArg
+          Identifier is
+        PositionalArg
+          ParenExpr
+            FunctionCall
+              Identifier b
+              PositionalArg
+                Identifier wild
+        PositionalArg
+          Word !
+    keyword end`)
+  })
+})
\ No newline at end of file