Digital Sundial 12hr Gnomon

This is a 12 hour version of the brilliant Digital Sundial by @Mojoptix. All credit goes to him for a great idea and code that was easy enough to understand that it took 2 seconds to modify it to make this 12 hour version.

All other necessary parts and instructions can be found with the original version:
http://www.thingiverse.com/thing:1068443