Click the Green Flag. The Recursive Algorithm will move a 15-disk tower from the left peg to the right peg. The Iterative Algorithm will then move the 15-disk tower back to the left peg.
Code things: 15 disks takes too long, so I used 11. Bigger disks are read as higher numbers in the code. The disks rendered are numbered from 1 to 11. There is actually a disk ID 12 at the bottom of all three towers, which allows the iterative algorithm to work properly. The recursive algorithm will only move 11 disks, and will not attempt to move the disk ID 12 under normal circumstances, in effect ignoring it. The bottom disk of each tower (which is disk ID 12 for all three towers) is not rendered.