JS1k: The JavaScript code golfing competition

var g=Math,j=g.PI,l=g.cos,m=g.sin,n=g.pow,u=j/3600,x=+new Date,y=window,A=y.requestAnimationFrame||y.webkitRequestAnimationFrame||y.mozRequestAnimationFrame||y.oRequestAnimationFrame||y.msRequestAnimationFrame||function(z){setTimeout(z,1E3/60)};c.width=600;c.height=400;
(function B(){function v(d){r=w?0.4+0.6*s:1-0.6*s;return n(1==k||2==k?j-d:d,r)*n(j,1-r)}A(B);var f,d,r,w,s,k,e,h,t,p;f=+new Date-x;var q=-j;a.clearRect(0,0,1E3,1E3);a.lineWidth=2;a.a="hsl(240,70%,60%)";p=240;a.beginPath();f=f%2400/600;k=~~f;s=f-k;w=!k||2==k;for(f=0;3600>f;f+=1)d=f*u,e=(20+5*l(100*v(d)))*l(d),h=-(20+5*l(100*v(d)))*m(d),d=20*m(100*d),e+=0,h+=30,d+=0,t=e*l(0)-d*m(0),e=e*m(0)+d*l(0),h=h*l(q)-d*m(q),d=h*l(q)-e*m(q),e=t*l(0)-h*m(0),h=t*m(0)+h*l(0),e=10*e+320,d=10*d+20,f||a.moveTo(e,d),
a.lineTo(e,d),f%300||(a.stroke(),a.beginPath(),a.moveTo(e,d),p=(p+18)%360,a.strokeStyle="hsl("+p+",70%,60%)");a.stroke()})();

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