JS1k: The JavaScript code golfing competition

r=10,MAX=100,drawCoin=(b,d,e,f)=>{c.translate(b,d),s=Math.sin(e);0==s||(c.scale(s,1),c.fillStyle='#DFDF00',c.strokeStyle='#FFFF00',f&&(c.fillStyle='#AAAAAA',c.strokeStyle='#DDDDDD'),c.lineWidth=3,c.beginPath(),c.arc(0,0,r,0,2*Math.PI),c.fill(),c.beginPath(),c.arc(0,0,r,0,2*Math.PI),c.stroke(),c.scale(1/s,1),c.translate(-b,-d))},draw=b=>{for(c.fillStyle='black',c.fillRect(0,0,a.width,a.height),i=0;i<b.length;i++)m=b[i],drawCoin(m.x,m.y,m.t,m.g),m.t+=0.1,m.y+=5,m.y>a.height&&b.splice(i,1);b.length<MAX&&0.2>Math.random()&&b.push({x:Math.floor(Math.random()*(a.width-(r+5)))+r+5,y:r+5,t:10,g:0.1>Math.random()}),requestAnimationFrame(()=>{draw(b)})},coins=[],draw(coins);

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

r = 10;
MAX = 100;

drawCoin = (x, y, t, g) => {
    c.translate(x, y);
    s = Math.sin(t);
    if (s == 0) {
        return;
    }
    c.scale(s,1);
    c.fillStyle   = '#DFDF00';
    c.strokeStyle = '#FFFF00';

    if (g) {
        c.fillStyle   = '#AAAAAA';
        c.strokeStyle = '#DDDDDD';
    }

    c.lineWidth   = 3;
    c.beginPath();
    c.arc(0, 0, r, 0, 2*Math.PI);
    c.fill();
    c.beginPath();
    c.arc(0, 0, r, 0, 2*Math.PI);
    c.stroke();
    c.scale(1/s,1);
    c.translate(-x, -y);
};

draw = (coins) => {
    c.fillStyle = 'black';
    c.fillRect(0, 0, a.width, a.height);

    for (i = 0; i < coins.length; i++) {
        m = coins[i];
        drawCoin(m.x, m.y, m.t, m.g);
        m.t += 0.1;
        m.y += 5;

        if (m.y > a.height) {
            coins.splice(i, 1);
        }
    }

    if (coins.length < MAX && Math.random() < 0.2) {
        coins.push({
            x: Math.floor(Math.random() * (a.width - (r + 5))) + r + 5,
            y: r + 5,
            t: 10,
            g: Math.random() < 0.1
        });
    }


    requestAnimationFrame(() => {draw(coins)});
};

coins = []

draw(coins);