JS1k: The JavaScript code golfing competition

var e=q=i=a=0,f=document,g=Math,h=g.random,j=g.abs,k=g.pow,l=H=600,m=y=l/2,n=[];c=f.getElementById("c");c.width=l;c.height=H;c=c.getContext("2d");f.onclick=function(){e=!e};f.onkeydown=function(){n=[];q=0};f.onmousemove=function(b){if(!e){m=b.clientX-9;y=b.clientY-9}};setInterval(function(){c.fillStyle="rgba(253,253,253,.4)";c.fillRect(0,0,l,H);for(i=2;i--;)n[q++]={x:h()*l,y:0,b:0,a:0};q%=400;c.fillStyle="rgba(40,10,100,.2)";for(i=n.length;i--;){var b=n[i],o=-0.4*h()*b.a-1;b.y+=b.a;b.a+=0.2;b.x+=b.b;var d=j(b.x-m);aty=j(y-b.y);if(d<60&&aty<119){d={x:d,y:aty};d.c=k(d.x*d.x+d.y*d.y,0.5);if(d.c<94){b.y=y-k(8836-d.x*d.x,0.5);b.b+=(b.x-m<0?-1:1)*0.5*h();b.a=h()*b.a<1?o:b.a=-h()*3}}if(b.y>H){b.a=h()<0.3?o:-h()*2;b.b+=0.25-h()/2;b.y=H}c.fillRect(b.x,b.y,0.5,-2*j(b.a))}c.fillStyle="rgba(0,120,255,.6)";c.beginPath();c.arc(m-4,y,4,g.PI,0,1);c.lineTo(m,y-96);c.stroke();c.beginPath();c.arc(m,y,94,-2.3,2.3-g.PI,0);y-=72;a=0;for(i=5;a=i*24,i--;)c.quadraticCurveTo(m-60+a-12,y-8,m-60+a-24,y);y+=72;c.fill();c.stroke()},10);

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