What sort of code would people want on their shirts?
main(k){float i,j,r,x,y=-16;while(puts(""),y++<15)for(x
=0;x++<84;putchar(" .:-;!/>)|&IH%*#"[k&15]))for(i=k=r=0;
j=r*r-i*i-2+x/25,i=2*r*i+y/10,j*j+i*i<11&&k++<111;r=j);}
compiled it looks like this ~ https://www.flickr.com/photos/bootload/tags/perlin from Ken Perlin blog ~ http://mrl.nyu.edu/~perlin/