JS1k: The JavaScript code golfing competition

n=document.body.children[0];with(n){c=getContext('2d');width=w=720;height=h=480;g=X=Y=x=y=i=o=0;z=65;d=function(a,b,c,d){return((a-c)*(a-c)+(b-d)*(b-d))};onmousedown=function(e){if(d(X,Y,x,y)<w){g=1;style.cursor="se-resize"}r()};onmouseup=function(e){style.cursor="default";g=0;if(d(w/3,h/3,x,y)>83200){x=y=0;z++;v()}}}onmousemove=function(e){X=e.pageX+.1;Y=e.pageY+.1};b=function(){if(g){x=X;y=Y;if(x<0)x=.1;if(y<0)y=.1}else{x=x*.9+3;y=y*.9+6}r()};with(c){r=function(){font="bold 140px sans-serif";textAlign="center";save();clearRect(0,0,w,h);p(i,z+1,0);beginPath();moveTo(y*y/2/x+x/2,0);lineTo(w*2,0);lineTo(0,h*2);lineTo(0,x*x/2/y+y/2);clip();p(o,z,0);translate(x,y);rotate(Math.atan2(y,x)*2);scale(-1,1);p(o,z,1);restore()};p=function(s,l,b){fillStyle="#"+s;e();f(0);fillText(String.fromCharCode(l),w/6,125);if(b){f(255);e()}};f=function(s){fillStyle="rgba("+s+","+s+","+s+",.4)"};e=function(){fillRect(0,0,w/3,h/3)}}v=function(){o=i;for(i=0;i<100;i=i*10+Math.random()*4+5);i-=i%1};v();v();setInterval("b()",35);

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

Original source not submitted