🐢 Honu

LOGO-style turtle graphics powered by Shrimp.

Quickstart

bun install
bun dev

Open http://localhost:3002

This builds the app and serves the dist/ folder with Python's built-in HTTP server.

Building

bun run build

Outputs a bundled browser app to dist/. The dist/ folder contains:

• index.html - The main page
• app.js - Bundled JavaScript (Parser + Compiler + ReefVM + CodeMirror)

You can serve the dist/ folder with any static file server, or even open index.html directly in a browser.

LOGO Commands

Movement

• forward n - Move forward n pixels
• back n - Move backward n pixels
• left n - Turn left n degrees
• right n - Turn right n degrees

Pen Control

• pen up - Lift pen (don't draw)
• pen down - Lower pen (draw)
• setcolor n - Set pen color (0-15)
• setwidth n - Set pen width
• clearscreen - Clear the canvas

Turtle Control

• home - Return to center, heading up
• setheading n - Set heading to n degrees
• setpos x y - Set position to (x, y)
• position - Get current position

Control Flow

• repeat n do: ... end - Repeat commands n times

Misc

• print value - Print to console
• wait n - Wait n milliseconds
• stop - Stop execution

Usage

1. Write Shrimp/LOGO code in the editor
2. Press Run (or Cmd+Enter) to execute
3. Watch the turtle draw on the canvas

Example - Draw a square:

repeat 4 do:
  forward 100
  right 90
end