Programming Puzzle

[EricVanWyk]

It may be easier to think in terms of "difference between where I am and where I want to be", and write as much of your code in that reference as possible. Then you will only have to handle the wrap-around in the one spot where you calculate that value. You will need some if statements and a little bit of math - if it is calculated as past half way around in one direction, map it in the other direction.