MCPInstall

flipoff-split-flap-display

Expert skill for building, customizing, and embedding the FlipOff split-flap display emulator — a free, offline-capable web app that turns any browser/TV into a retro airport departure board.

Installs
850
Last 24h
—
Trending rank
—
Security
Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/reason-machines/trending-skills --skill flipoff-split-flap-display
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads flipoff-split-flap-display automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

FlipOff Split-Flap Display Emulator

Skill by ara.so — Daily 2026 Skills collection.

FlipOff is a pure vanilla HTML/CSS/JS web app that emulates classic mechanical split-flap (flip-board) airport displays. No frameworks, no npm, no build step — open index.html and you have a full-screen retro display with authentic scramble animations and clacking sounds.


Installation

git clone https://github.com/magnum6actual/flipoff.git
cd flipoff

# Option 1: Open directly
open index.html

# Option 2: Serve locally (recommended for audio)
python3 -m http.server 8080
# Visit http://localhost:8080

Audio note: Browsers block autoplay. The user must click once to enable the Web Audio API context. After that, sound plays automatically on each message transition.


File Structure

flipoff/
  index.html               — Single-page app entry point
  css/
    reset.css              — CSS reset
    layout.css             — Header, hero, page layout
    board.css              — Board container and accent bars
    tile.css               — Tile styling and 3D flip animation
    responsive.css         — Media queries (mobile → 4K)
  js/
    main.js                — Entry point, wires everything together
    Board.js               — Grid manager, transition orchestration
    Tile.js                — Per-tile animation logic
    SoundEngine.js         — Web Audio API playback
    MessageRotator.js      — Auto-rotate timer
    KeyboardController.js  — Keyboard shortcut handling
    constants.js           — All configuration lives here
    flapAudio.js           — Base64-encoded audio data

Key Configuration — js/constants.js

Everything you'd want to change lives in one file:

// js/constants.js (representative structure)

export const GRID_COLS = 26;        // Characters per row
export const GRID_ROWS = 8;         // Number of rows

export const SCRAMBLE_DURATION = 600;  // ms each tile scrambles before settling
export const STAGGER_DELAY = 18;       // ms between each tile starting its scramble
export const AUTO_ROTATE_INTERVAL = 8000; // ms between auto-advancing messages

export const SCRAMBLE_COLORS = [
  '#FF6B35', '#F7C59F', '#EFEFD0',
  '#004E89', '#1A936F', '#C6E0F5'
];

export const ACCENT_COLORS = ['#FF6B35', '#004E89', '#1A936F'];

export const MESSAGES = [
  "HAVE A NICE DAY",
  "ALL FLIGHTS ON TIME",
  "WELCOME TO THE FUTURE",
  // Add your own here
];

Adding Custom Messages

Edit MESSAGES in js/constants.js. Each message is a plain string. The board wraps text across the grid automatically.

export const MESSAGES = [
  "DEPARTING GATE 7",
  "YOUR COFFEE IS READY",
  "BUILD THINGS THAT MATTER",
  "FLIGHT AA 404 NOT FOUND",    // max GRID_COLS * GRID_ROWS chars
];

Padding rules: Messages shorter than the grid are padded with spaces. Messages longer than the grid are truncated. Keep messages at or under GRID_COLS × GRID_ROWS characters.


Changing Grid Size

// Compact 16×4 ticker-style board
export const GRID_COLS = 16;
export const GRID_ROWS = 4;

// Wide cinema board
export const GRID_COLS = 40;
export const GRID_ROWS = 6;

// Tall info kiosk
export const GRID_COLS = 20;
export const GRID_ROWS = 12;

After changing grid dimensions, tiles re-render automatically on next page load.


Keyboard Shortcuts

KeyAction
Enter / SpaceNext message
Arrow LeftPrevious message
Arrow RightNext message
FToggle fullscreen
MToggle mute
EscapeExit fullscreen

Programmatic API

Board

// Board.js exposes a class you can instantiate directly
import Board from './js/Board.js';

const board = new Board(document.getElementById('board-container'));

// Display a specific string
board.setMessage('GATE CHANGE B12');

// Advance to next message in the rotation
board.next();

// Go back
board.previous();

MessageRotator

import MessageRotator from './js/MessageRotator.js';

const rotator = new MessageRotator(board, messages, AUTO_ROTATE_INTERVAL);

rotator.start();   // begin auto-advancing
rotator.stop();    // pause rotation
rotator.next();    // manual advance
rotator.previous(); // manual back

SoundEngine

import SoundEngine from './js/SoundEngine.js';

const sound = new SoundEngine();

// Must call after a user gesture (click/keypress)
await sound.init();

sound.play();    // play the flap transition sound
sound.mute();    // silence
sound.unmute();
sound.toggle();  // flip mute state

KeyboardController

import KeyboardController from './js/KeyboardController.js';

const kb = new KeyboardController({
  onNext:       () => rotator.next(),
  onPrevious:   () => rotator.previous(),
  onFullscreen: () => toggleFullscreen(),
  onMute:       () => sound.toggle(),
});

kb.attach();   // start listening
kb.detach();   // stop listening

Embedding FlipOff in Another Page

As an iframe

<iframe
  src="/flipoff/index.html"
  width="1280"
  height="400"
  style="border:none; background:#000;"
  allowfullscreen
></iframe>

Inline embed (pull in just the board)

<!-- In your page -->
<div id="flip-board"></div>

<script type="module">
  import Board from '/flipoff/js/Board.js';
  import SoundEngine from '/flipoff/js/SoundEngine.js';
  import { MESSAGES, AUTO_ROTATE_INTERVAL } from '/flipoff/js/constants.js';

  const board = new Board(document.getElementById('flip-board'));
  const sound = new SoundEngine();

  let idx = 0;
  board.setMessage(MESSAGES[idx]);

  document.addEventListener('click', async () => {
    await sound.init();
  }, { once: true });

  setInterval(() => {
    idx = (idx + 1) % MESSAGES.length;
    board.setMessage(MESSAGES[idx]);
    sound.play();
  }, AUTO_ROTATE_INTERVAL);
</script>

Custom Color Themes

// js/constants.js — dark blue terminal theme
export const SCRAMBLE_COLORS = [
  '#0D1B2A', '#1B2838', '#00FF41',
  '#003459', '#007EA7', '#00A8E8'
];

export const ACCENT_COLORS = ['#00FF41', '#007EA7', '#00A8E8'];
/* css/board.css — override tile background */
.tile {
  background-color: #0D1B2A;
  color: #00FF41;
  border-color: #003459;
}

Common Patterns

Show real-time data (e.g., a flight API)

import Board from './js/Board.js';
import SoundEngine from './js/SoundEngine.js';

const board = new Board(document.getElementById('board'));
const sound = new SoundEngine();

async function fetchAndDisplay() {
  const res = await fetch('/api/departures');
  const data = await res.json();
  const message = `${data.flight}  ${data.destination}  ${data.gate}`;
  board.setMessage(message.toUpperCase());
  sound.play();
}

document.addEventListener('click', () => sound.init(), { once: true });
setInterval(fetchAndDisplay, 30_000);
fetchAndDisplay();

Cycle through a custom message list

const promos = [
  "SALE ENDS SUNDAY",
  "FREE SHIPPING OVER $50",
  "NEW ARRIVALS THIS WEEK",
];

let i = 0;
setInterval(() => {
  board.setMessage(promos[i % promos.length]);
  sound.play();
  i++;
}, 5000);

React/Vue wrapper (import as a module)

// FlipBoard.jsx
import { useEffect, useRef } from 'react';
import Board from '../flipoff/js/Board.js';
import { MESSAGES } from '../flipoff/js/constants.js';

export default function FlipBoard({ messages = MESSAGES, interval = 8000 }) {
  const containerRef = useRef(null);
  const boardRef = useRef(null);

  useEffect(() => {
    boardRef.current = new Board(containerRef.current);
    let idx = 0;
    boardRef.current.setMessage(messages[idx]);

    const timer = setInterval(() => {
      idx = (idx + 1) % messages.length;
      boardRef.current.setMessage(messages[idx]);
    }, interval);

    return () => clearInterval(timer);
  }, []);

  return <div ref={containerRef} className="flip-board-container" />;
}

Troubleshooting

ProblemFix
No soundUser must click/interact first; Web Audio requires a user gesture
Sound works locally but not deployedEnsure flapAudio.js (base64) is served; check MIME types
Tiles don't animateVerify CSS tile.css is loaded; check for JS console errors
Grid overflows on small screensReduce GRID_COLS/GRID_ROWS in constants.js or add CSS overflow: hidden
Fullscreen not workingF key calls requestFullscreen() — some browsers require the page to be focused
Messages cut offString length exceeds GRID_COLS × GRID_ROWS; shorten or increase grid size
Audio blocked by CSPAdd media-src 'self' blob: data: to your Content-Security-Policy
CORS error loading modulesServe with a local server (python3 -m http.server), not file://

Tips for TV / Kiosk Deployment

# Serve with a simple static server
npx serve .              # Node
python3 -m http.server   # Python

# Auto-launch fullscreen in Chromium kiosk mode
chromium-browser --kiosk --app=http://localhost:8080

# Hide cursor after idle (add to index.html)
document.addEventListener('mousemove', () => {
  document.body.style.cursor = 'default';
  clearTimeout(window._cursorTimer);
  window._cursorTimer = setTimeout(() => {
    document.body.style.cursor = 'none';
  }, 3000);
});

FAQ

What does the flipoff-split-flap-display skill do?

Expert skill for building, customizing, and embedding the FlipOff split-flap display emulator — a free, offline-capable web app that turns any browser/TV into a retro airport departure board.

How do I install flipoff-split-flap-display?

Run npx skills add https://github.com/reason-machines/trending-skills --skill flipoff-split-flap-display in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/flipoff-split-flap-display/ (personal) or .claude/skills/flipoff-split-flap-display/ (project).

Which AI agents can use flipoff-split-flap-display?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is flipoff-split-flap-display safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains flipoff-split-flap-display?

It is published by reason-machines in reason-machines/trending-skills. It has 850 recorded installs.

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