TowersOfHanoi
—Josh Feler

This Karel contest entry solves the Tower of Hanoi problem for any size. Necessary conditions for the functioning of the program are that the problem be modeled in a world with three columns (height can be anything taller than number of discs in the problem + 1) and that all the discs start on the third column in a legal formation (ie, discs must be in proper ascending order from the top). Disc size is modeled by the number of beepers on a corner. A corner with 3 beepers represents a disc smaller than a corner with 7 beepers, etc.