extraction of matraka demo

MATRAKA.js

/*
	<canvas id=c>
	<img src=# onload=
		for( a=c.getContext('2d'), i=e='', S=String.fromCharCode;
		     a.drawImage(this,i--,0),
		     t=a.getImageData(0,0,1,1).data[0];
		   ) e += S(t);
		(1,eval)(e)
	>
*/

M = [R = Math.random,
     Q = Math.cos,
     c.style.cssText = 'position:fixed;top:0;left:0;width:100%;height:100%;background:#000',
     e = 'data:audio/wav;base64,UklGRiQAAABXQVZFZm10IBAAAAABAAEAwF0AAMBdAAABAAgAZGF0YQAA'
     ];
for (t = 2560; t--;) M[t] = {
    t: t,
    u: t % 48 / 7.64,
    v: t / 366.7,
    x: 128 - R() * 256,
    y: 64 - R() * 256,
    z: 128 - R() * 256
};
for (t = 0; t++ < 8e5;) {
  e += btoa(S('13107103135701314204' // there was a space here when i ran through beautifier
                 [(t >> 10 & 15) + (t >> 13 & 4)] * t & 96,
                 R() * 127 * (Math.pow(t / 144000 % 1, 16) / 4 + Math.pow(1 - t / 144000 % 1, 64)),
                 t >> 10 & 7 ^ 5 || R() * 127)
           );
}
Z = new Audio(e);
Z.play(setInterval(function b(v, w) {
    if (v) return w.W - v.W;
    M.sort(b);
    h = c.height = 0 | 300 * innerHeight / innerWidth;
    C = Q(r = Z.currentTime / 2);
    S = Q(r - 8);
    a.rotate((r & 13) / 64 - .1);
    B = r / 9;
    A = Math.pow(B % 1, 64);
    d = [1 - A, 0, A][0 | B++ % 3];
    f = [1 - A, 0, A][0 | B++ % 3];
    e = [1 - A, 0, A][0 | B++ % 3];
    for (t = 2560; t--;) {
        v = M[t];
        if (v.W > 0) {
          a.fillRect(150 - v.W * v.U, v.W * (v.y + Math.max(16 * Q(r), 150 - r * 42)) + h / 2,
          v.W * 7,
          v.W * 7,
          a.fillStyle = 'hsl(' + [r * 17 - v.y + R() * 48, (16 + R() * 48) + '%',
          v.W * 7 + 32 - 32 * Q(v.u * 2 - 8) * Q(v.v * 3 - 8)] + '%)');
        }
        if (v.t < 2304) {
          Y = 96 - 30 * v.v,
          D = 32 + 8 * Q(v.u * 2) * Q(v.v * 3),
          v.x = (96 - 30 * v.u) * d + D * (Q(v.u) * e + Q(v.u) * Q(v.v / 2 - 8) * f),
          v.z = Y * d + D * (Q(v.u - 8) * e + Q(v.u - 8) * Q(v.v / 2 - 8) * f),
          v.y = D * d + Y * e + D * Q(v.v / 2) * f;
        }
        v.W = 128 / (v.z * C - v.x * S + 96);
        v.U = v.x * C + v.z * S
    }
    a.fillText(['P01 4MAT', 'MATRAKA'][B & 1].substr(a.drawImage(c,
                                                                 0,
                                                                 r * h % h,
                                                                 32,
                                                                 h / 8 * (3 + A + Q(B + A)),
                                                                 0,
                                                                 r * h % h,
                                                                 300,
                                                                 h / 8 * (3 + A + Q(B + A))),
                                                                 r * 8 - 48) + '|',
                                                                 32,
                                                                 h / 2)
}, Z.loop = 9))