JS1k: The JavaScript code golfing competition

eval('b.style.textAlign="center";j=c.style;j.border="solid 5px";~q(e,f,k){d[i=e+f*w<<2]=k.c;d[++i]=k.b;d[++i]=k.a;d[++i]=255}~r(e,f){@{c:d[i=e+f*w<<2],b:d[++i],a:d[++i],d:d[++i]}}~t(){@{c:256*I()>>0,b:256*I()>>0,a:256*I()>>0}}~u(e,f){@{c:e.c+f.c>>1>>0,b:e.b+f.b>>1>>0,a:e.a+f.a>>1>>0}}~x(e){@ 0>e?0:255<e?255:e>>0}~y(e,f){@{c:x(e.c+2*I()*f+0.75-f),b:x(e.b+2*I()*f+0.75-f),a:x(e.a+2*I()*f+0.75-f)}}~E(e,f,k,v,z,A,B,C){var g=k-e,h=v-f,l=(g>>1)+e,m=(h>>1)+f,D=g>>1,n=h>>1,p,s;1>=g&&1>=h||(h=r(l,f),0==h.d&&(h=y(u(z,A),D)),q(l,f,h),g=r(e,m),0==g.d&&(g=y(u(z,B),n)),q(e,m,g),q(k,m,p=y(u(A,C),n)),q(l,v,n=y(u(B,C),D)),q(l,m,y(s={c:h.c+n.c+g.c+p.c>>2>>0,b:h.b+n.b+g.b+p.b>>2>>0,a:h.a+n.a+g.a+p.a>>2>>0},D)),E(e,f,l,m,z,h,g,s),E(l,f,k,m,h,A,s,p),E(e,m,l,v,g,s,B,n),E(l,m,k,v,s,p,n,C))}w=c.width=c.height=500;d1=a.createImageData(w,w);d=d1.data;I=Math.random;q(0,0,c1=t());q(w-1,0,c2=t());q(0,w-1,c3=t());q(w-1,w-1,c4=t());E(0,0,w-1,w-1,c1,c2,c3,c4);a.putImageData(d1,0,0)'.replace(/~/g,'function ').replace(/@/g,'return'))

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