JS1k: The JavaScript code golfing competition

for(A="[c.@o@BanDntF12H99LatqMqh.~~cos(t/O*ON33RR)QH8_L)^256ZQN^)YY*_,Z-XerW0,V]=UBfyU'#);else ](;c@sn^/R00~sin()*~sign(t/),QN^VOLZfor(i~abs((x-yx+y)+~PI*kI.dqa.fill(fcVV5H,5H*_)gAU)x=i%Z-_,y=i/Z-_,	t%14UH7*k+H7N;i<Z*Z||BpgI,V0);i+=Q*Ldan,-_,-_)I.dqa[i*4,Bfx'Greets to evWyone ovW q dwittW Dd jsgolf! ThDks PetW for orgDizing JS1K!',1~max(~min~max)-^
n=documeF.creqeElemeF`cDvas`; in o=n.getCoFext`2d`)c[i[0]+i[6]Ui;I=c@cIZ,Zn.width=n.height=Zt=Vo.foF='4em sDs-sWif';setIFWval(A=>{if(++<250)=01	
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-U-Z^_QRNO~qLHFDB@]/.exec(A);)with(A.split(G))A=join(shift());eval(A)

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

// https://github.com/prplz/js1k-2019

n = document.createElement`canvas`
o = n.getContext`2d`
I = c.createImageData(256, 256),
    I.data.fill(n.width = n.height = 256),
    t = 0,
    o.font = '4em sans-serif'

setInterval(_ => {
    if (++t % 1400 < 250)
        for (i = 0; i < 256 * 256 || o.putImageData(I, 0, 0); i += 1)
            x = i % 256 - 128,
                y = i / 256 - 128,
                // http://www.iquilezles.org/www/articles/distfunctions2d/distfunctions2d.htm
                Math.max(Math.min(Math.abs(x - y), Math.abs(x + y)), Math.max(Math.abs(x - y), Math.abs(x + y)) - 99) < t % 1400 * 2 && (I.data[i * 4] = I.data[i * 4 + 1] = I.data[i * 4 + 2] = Math.max(Math.min(Math.abs(x - y), Math.abs(x + y)), Math.max(Math.abs(x - y), Math.abs(x + y)) - 99) % 30 < 20 ? 0 : 256)
    else if (t % 1400 < 500)
        for (i = t % 7; i < 256 * 256 || o.putImageData(I, 0, 0); i += 7)
            x = i % 256 - 128,
                y = i / 256 - 128,
                k = Math.abs(30 - Math.max(Math.min(Math.abs(x - y), Math.abs(x + y)), Math.max(Math.abs(x - y), Math.abs(x + y)) - 99)) > 10,
                v = Math.sin(x * Math.cos(t / 99) / 33 - y * Math.sin(t / 99) / 33 + y * Math.cos(t / 99) / 33 + x * Math.sin(t / 99) / 33)
                + Math.sin(y / 33)
                + Math.sin(x / 20)
                + Math.sin(Math.hypot(x + 99 * Math.cos(t / 33), y + 99 * Math.sin(t / 33)) / 20),
                I.data[i * 4] = 127 * k + 127 * Math.cos(t / 30 + v + Math.PI * k),
                I.data[i * 4 + 1] = 127 * k + 127 * Math.cos(t / 10 + v * 2 + Math.PI * k),
                I.data[i * 4 + 2] = 127 * k + 127 * Math.cos(t / 13 + v * 3 + Math.PI * k)
    else
        I.data.fill(256),
            o.resetTransform(o.fillStyle = '#fff'),
            o.fillRect(0, 0, 512, 512),
            o.fillStyle = '#000',
            o.fillText('Greets to everyone over at dwitter and jsgolf! Thanks Peter for organizing JS1K!', 1256 - t % 1400 * 2, 200),
            o.rotate(Math.PI),
            o.fillText('Greets to everyone over at dwitter and jsgolf! Thanks Peter for organizing JS1K!', 1000 - t % 1400 * 2, -56)

    c.resetTransform(c.globalAlpha = 1)
    c.fillRect(0, 0, 512, 512)

    // front/back
    c.setTransform(
        Math.cos(t / 33 /*yaw*/) * Math.sign(Math.cos(t / 33 /*yaw*/) * Math.cos(t / 99 /*pitch*/)),
        Math.sin(t / 33 /*yaw*/) * Math.sin(t / 99 /*pitch*/) * Math.sign(Math.cos(t / 33 /*yaw*/) * Math.cos(t / 99 /*pitch*/)),
        0,
        Math.cos(t / 99 /*pitch*/),
        256 + Math.sin(t / 33 /*yaw*/) * Math.sign(Math.cos(t / 33 /*yaw*/) * Math.cos(t / 99 /*pitch*/)) * 128,
        256 - Math.cos(t / 33 /*yaw*/) * Math.sin(t / 99 /*pitch*/) * Math.sign(Math.cos(t / 33 /*yaw*/) * Math.cos(t / 99 /*pitch*/)) * 128)
    c.globalAlpha = Math.abs(Math.cos(t / 33 /*yaw*/) * Math.cos(t / 99 /*pitch*/))
    c.drawImage(n, -128, -128)

    // left/right
    c.setTransform(
        Math.sin(t / 33 /*yaw*/) * Math.sign(Math.sin(t / 33 /*yaw*/) * Math.cos(t / 99 /*pitch*/)),
        -Math.cos(t / 33 /*yaw*/) * Math.sin(t / 99 /*pitch*/) * Math.sign(Math.sin(t / 33 /*yaw*/) * Math.cos(t / 99 /*pitch*/)),
        0,
        Math.cos(t / 99 /*pitch*/),
        256 - Math.cos(t / 33 /*yaw*/) * Math.sign(Math.sin(t / 33 /*yaw*/) * Math.cos(t / 99 /*pitch*/)) * 128,
        256 - Math.sin(t / 33 /*yaw*/) * Math.sin(t / 99 /*pitch*/) * Math.sign(Math.sin(t / 33 /*yaw*/) * Math.cos(t / 99 /*pitch*/)) * 128)
    c.globalAlpha = Math.abs(Math.sin(t / 33 /*yaw*/) * Math.cos(t / 99 /*pitch*/))
    c.drawImage(n, -128, -128)

    // top/bottom
    c.setTransform(
        Math.cos(t / 33 /*yaw*/) * Math.sign(Math.sin(t / 99 /*pitch*/)),
        Math.sin(t / 33 /*yaw*/) * Math.sin(t / 99 /*pitch*/) * Math.sign(Math.sin(t / 99 /*pitch*/)),
        -Math.sin(t / 33 /*yaw*/),
        Math.cos(t / 33 /*yaw*/) * Math.sin(t / 99 /*pitch*/),
        256,
        256 + Math.cos(t / 99 /*pitch*/) * Math.sign(Math.sin(t / 99 /*pitch*/)) * 128)
    c.globalAlpha = + Math.abs(Math.sin(t / 99 /*pitch*/))
    c.drawImage(n, -128, -128)
}, 33)