Here's another visualization of the Gray code: http://billmill.org/static/perm4.png http://billmill.org/static/perm4.png (it's from a few visualizations of per

Here's another visualization of the Gray code: http://billmill.org/static/perm4.png http://billmill.org/static/perm4.png (it's from a few visualizations of permutations I did a while ago: http://billmill.org/permvis.html http://billmill.org/permvis.html )