http://wry.me/hacking/Turing-Drawings/#4,4,2,1,2,1,1,1,2,3,3...
[ https://news.ycombinator.com/item?id=5709406 ]
http://wry.me/hacking/Turing-Drawings/#4,4,2,1,2,1,1,1,2,3,3...