JS1k: The JavaScript code golfing competition

function w(e,o,l,n){c.moveTo(e,o),c.lineTo(l,n)}function l(e,o,l,n,i,t,m,T,w,v,f,r,a,s,u,F){c.moveTo(e,o),c.lineTo(l,n),c.moveTo(i,t),c.lineTo(m,T),c.moveTo(w,v),c.lineTo(f,r),c.moveTo(a,s),c.lineTo(u,F)}m=0,setInterval(function(){c.lineWidth=3,c.strokeStyle="#FFF",c.fillStyle="#000",c.clearRect(0,0,500,500),c.fillRect(0,0,500,500),c.beginPath(),w(0,0,200,200),w(0,500,200,300),w(500,0,300,200),w(500,500,300,300),w(200,200,200,300),w(300,200,300,300),0==m?(l(100,100,100,400,400,100,400,400,200,200,200,300,300,200,300,300),m=1):1==m&&(l(50,50,50,450,450,50,450,450,150,150,150,350,350,150,350,350),m=0),c.stroke()},500);

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