JS1k: The JavaScript code golfing competition

(H=document).onkeydown=function(){T=!T};H.body.innerHTML+='<h1>φυσις κρυπτεσθαι φιλει - the flying carpet<style>body *{position:absolute;top:0;left:0;width:100%;height:100%;font:16px/32px serif;color:#333}h1{margin:0;padding:0 10px;width:auto}</style>';H=H.getElementById('c');E=H.width=H.height=600;R=H.getContext('2d');R.fillRect(0,0,E,E);R.l=R.lineTo;A=255;C=A/2;L=0;I=8;T=Math;U=T.sin;S=T.sqrt(3)/2;setInterval(function(){if(T){a=(1+U(3*U(23*L)))*C;b=(1+U(5*U(19*L)))*C;c=(1+U(7*U(17*L)))*C;d=(1+U(11*U(13*L)))*C;e=.2+.4*(1+U(3*U(17*L)));f=300+U(5*U(19*L))*C;g=300+U(7*U(23*L))*C;L+=.0003;R.drawImage(H,f/30,g/50,585,590,0,0,E,E);for(h=0;h<A;h+=5){for(i=0;i<A;i+=5){j=a+h*(b-a)/A;k=(c+h*(d-c)/A-j)/A;l=(b+i*(d-b)/A-a-i*(c-a)/A)/A;j+=i*k;R.fillStyle="rgb("+h+","+(j>>0)+","+i+")";R.beginPath();m=f-e*(220-h*S-i*S);j=g+e*(127+h*.5-i*.5-j);R.moveTo(m,j);R.l(m+e*I*S,j-e*(I*0.5+k*I));R.l(m+e*I*2*S,j-e*(k*I+l*I));R.l(m+e*I*S,j+e*(I*.5-l*I));R.closePath();R.fill();}}}},75)

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