JS1k: The JavaScript code golfing competition

var c=document,d=c.body,f=d.style,g=d.children[0],h=innerWidth,i=innerHeight,j=0,k=2*Math.PI,l=3,m=tx=h/2,n=ty=i/2;f.margin="0";f.background="#000";f.overflow="hidden";g.width=h;g.height=i;t=g.getContext("2d");z=function(){l=++l%14};c.ontouchstart=function(e){z();tx=e.touches[0].pageX;ty=e.touches[0].pageY;j=!j};c.onkeyup=function(){j=!j};c.onmousemove=function(e){tx=e.clientX;ty=e.clientY};c.onmousedown=z;setInterval('if(j){t.globalCompositeOperation="source-over";t.fillStyle="rgba(0,0,0,.05)";t.fillRect(0,0,h,i)}else t.clearRect(0,0,h,i);t.globalCompositeOperation="lighter";t.save();m+=(tx-m)/20;n+=(ty-n)/20;t.translate(m,n);for(b=new Date,a=1;a<=l;a++){t.fillStyle="rgba("+255*(a%3)+","+255*((a+1)%3)+","+255*((a+2)%3)+",.5)";t.beginPath();t.rotate((b.getSeconds()+a)/a*4+b.getMilliseconds()/a/250);t.translate(a,0);t.arc(-3*l,-4*l,99-l*4,0,k,0);t.fill()}t.save();t.fillStyle="#fff";for(a=1;a<=l;a++){t.beginPath();t.rotate(2);t.translate(0,28);t.arc(-99,-99,5,0,k,0);t.fill()}t.restore();t.restore()',9)

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

http://blah.thingsinjars.com/post/293/the-quest-for-extreme-javascript-minification/