Raytraced Checkboard in 128b of JavaScript (p01.org)

This is ridiculously awesome. n=setInterval("for(n+=7,i=k,P='p.\\n';i-=1/k;P+=P[i%2?(i%2*j-j+n/k^j)&1:2])j=k/i;p.innerHTML=P",k=64)

Very impressive!