JS1k: The JavaScript code golfing competition

with(Math){U=innerHeight/innerWidth;c=document.body.children[0];w=c.width=55;h=c.height=U*w;c.innerHTML='<style>*{width:100%;height:100%;margin:0;overflow:hidden;}</style>';C=c.getContext('2d');eu=[0,1,0];el=[1,0,0];ed=[0,0,1];r=0;function S(a,b){return[a[0]*b,a[1]*b,a[2]*b]}function N(a){return S(a,1/Math.sqrt(a[0]*a[0]+a[1]*a[1]+a[2]*a[2]))}function D(a,b){return a[0]*b[0]+a[1]*b[1]+a[2]*b[2]}function A(a,b){return[a[0]+b[0],a[1]+b[1],a[2]+b[2]]}setInterval(function(){r+=0.1;o=[];for(i=0;i<10;++i){o.push([[5*cos(i*PI/5+r),5*sin(i*PI/5+r),7+4*sin(r/2-i*PI/5)],1]);}for(y=0;y<h;++y){for(x=0;x<w;++x){lp=S(el,x/w*5-2.5);lu=S(eu,(y/h*5-2.5)*U);d=N(A(ed,A(lp,lu)));t=-1;for(z=0;z<o.length;++z){Z=o[z];At=D(d,d);Bt=D(S(Z[0],-2),d);Ct=D(Z[0],Z[0])-Z[1];I=Bt*Bt-4*At*Ct;if(I>0){t=1;break;}}if(t>0){C.fillStyle='rgb(255,0,0)';}else{df=pow(1-(sqrt(pow(w/2-x,2)+pow(h/2-y,2))/sqrt(w*w+h*h)),2);f=floor;C.fillStyle='rgb('+f(155*df)+','+f(201*df)+','+f(204*df)+')';}C.fillRect(x,y,1,1);}}},33);}

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