Source code for a useless box.

box.js

import Servo from "pins/servo";
import Timer from "timer";
import Digital from "pins/digital";
import Monitor from "pins/digital/monitor";
import NeoPixel from "neopixel";

const doorServo = new Servo({pin: 5});
const armServo = new Servo({pin: 14});
const switchMonitor = new Monitor({
	mode: Digital.InputPullUp,
	pin: 18,
	edge: Monitor.Falling
});
const pixel = new NeoPixel({length: 4, pin: 13, order: "GRB"});
pixel.brightness = 0;
const color = {
	white: pixel.makeRGB(255, 255, 255),
	blue: pixel.makeRGB(0, 0, 255),
	red: pixel.makeRGB(255, 0, 0),
	green: pixel.makeRGB(0, 255, 0)
}

const colorSequence = [color.white, color.blue, color.red, color.green];
let colorIndex = 0;

trace('startup\n');

switchMonitor.onChanged = function() {
	if(switchMonitor.busy) {
		return;
	}

	trace('starting sequence\n');
	doSequence();
}

async function doSequence() {
	switchMonitor.busy = true;
	pixel.brightness = 255;
	pixel.fill(colorSequence[colorIndex]);
	pixel.update();

	trace('opening door\n');
	doorServo.write(90);
	await delay(250);

	trace('extending arm\n');
	armServo.write(30);
	await delay(500);

	trace('retracting arm\n');
	armServo.write(120);
	await delay(250);


	trace('closing door\n');
	doorServo.write(180);
	pixel.brightness = 0;
	pixel.update();
	await delay(150)

	switchMonitor.busy = false;
	trace('ending sequence');

	colorIndex = colorIndex++ % 4;
}

function delay(ms) {
	return new Promise(r => Timer.set(r, ms));
}