JS1k: The JavaScript code golfing competition

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//Numbers we use, 0, 3, 300, 78, 13, 150
var c = window.a;
var ctx = c.getContext("2d");
//Generate a array of stars and lights
var stars = [];
var poles = [];
//This keeps track of the bumps
var offset = 0;
var light1Offset = 0;
var light2Offset = -60;
var clickCount = 0;

//Floor
ctx.fillStyle = "#544";
ctx.fillRect(0, 0, 300, 300);
//Blood
ctx.fillStyle = "#B32";
ctx.fillRect(40, 13, 150, 150);
drawPerson(70);
ctx.fillText("X", 108, 45);
ctx.fillText("X", 118, 45);


ctx.fillStyle = "#FFF";

ctx.fillText("Who killed him? (Click)", 13, 13);


function drawPerson(peopleOffset) {
    //Face
    ctx.fillStyle = "#"+(peopleOffset>70?"B":"F")+(peopleOffset>70?"8":"C")+"5";
    ctx.fillRect(30 + peopleOffset, 30+offset, 30, 40);
    //Body
    ctx.fillStyle = "#B"+peopleOffset % 8 + peopleOffset % 3;
    ctx.fillRect(20 + peopleOffset, 70+offset, 50, 60);
    ctx.fillRect(15 + peopleOffset, 75+offset, 60, 55);
    //Pants
    ctx.fillStyle = "#433";
    ctx.fillRect(20 + peopleOffset, 130+offset, 50, 60);
    //Face
    ctx.fillRect(40 + peopleOffset, 40+offset, 3, 3);
    ctx.fillRect(50 + peopleOffset, 40+offset, 3, 3);
    ctx.fillRect(40 + peopleOffset, 60+offset, 10, 3);
}

c.onclick = function () {
    clickCount++;

    for (i = 0; i < 10000; i++) {
        stars.push([i * (i % 13), i % 78]);
        poles.push(i * 300);
    }


    //Main loop for drawing everything
    setInterval(function () {

        //Paint sky
        ctx.fillStyle = "#124";
        ctx.fillRect(0, 0, 300, 300);

        //Move stars forward
        //Each tuple inside the stars array is a reference
        //using map is actually not as functional as one might like
        stars.map(function (star) {
            star[0]--;
            return star;
        }).forEach(function (star) {
            ctx.fillStyle = "#CCE";
            star[0]--;
            ctx.fillRect(star[0], star[1], 3, 3);
        });

        //Move poles
        poles = poles.map(function (pole) {
            pole -= 13;
            return pole;
        })
        poles.forEach(function (arr) {
            ctx.fillStyle = "#433";
            ctx.fillRect(arr, 0, 13, 150);
        })

        ctx.fillStyle = "#544";
        //Left hand side cabin wall
        ctx.fillRect(0, 0, 78, 300);
        //Cabin wall between windows
        ctx.fillRect(150, 0, 78, 300);
        //Bottom cabin wall
        ctx.fillRect(0, 78 + offset, 300, 300);
        //top wall
        ctx.fillRect(0, -13 + offset, 300, 30);

        //Light
        for (i = 0; i < 3; i++) {
            var window2Offset = i * 150;
            var lightOffset = window2Offset ? light2Offset : light1Offset;

            //Light in left window
            ctx.beginPath();
            ctx.fillStyle = "rgba(230,255,255," + ((Math.sin(lightOffset) + 1) - 1.3) + ")";
            ctx.moveTo(78 + window2Offset, 13 + offset);
            ctx.lineTo(150 + window2Offset, 13 + offset);
            ctx.lineTo(150 + window2Offset, 78 + offset);

            //Light outside
            ctx.lineTo(150 + 40 + lightOffset + window2Offset, 78 + offset + 80);
            ctx.lineTo(78 - 40 + lightOffset + window2Offset, 78 + offset + 80);

            ctx.lineTo(78 + window2Offset, 78 + offset);
            ctx.lineTo(78 + window2Offset, 13 + offset);
            ctx.fill();

            drawPerson(i * 78);
        }

        //Increase train bumps 
        offset < 3 ? offset += 0.3 : offset = 0;

        //Light offset
        light1Offset < 60 ? light1Offset += 6 : light1Offset = -60;
        light2Offset < 60 ? light2Offset += 6 : light2Offset = -60;
        if (clickCount > 1) {
            ctx.fillStyle = "rgba(200,20,20," + ((Math.sin(lightOffset) + 1) - 1.3) + ")";
            ctx.fillRect(0, 0, 300, 300);
            ctx.fillStyle = "#FFF";
            ctx.fillText("No. You killed him by starting this game...", 10, 10);
        } else {
            ctx.fillStyle = "#FFF";
            ctx.fillText("Think... Who could have done it? (Click)", 10, 10);
        }
    }, 150);
}