This variation of the Towers of Hanoi is very similar to the regular problem: you are given one stack of disks and three pegs, and you cannot move a larger disk over a smaller one. The change is that you can only move disks clockwise: 0->1 or 1->2 or 2->0, but never in the other direction.
Obviously, the movements are not symmetric anymore. Moves from A to B are now very different from moves to B to A. As a result, you need two recursive functions depending on whether you are moving the stack clockwise or counterclockwise.
That being said, the problem decomposition is very similar to the classical Hanoi. The twist is that each function call the other one, constituting a nice example of mutual recursion.