Step 13: The Robot Pumpkin Head Circuit
I will try an post a video of the flashing pumpkin head LEDs and code when I get more time.
For details on Charliplexing see: http://www.instructables.com/id/Charlieplexing-LEDs--The-theory/
I did not have time to make an embedded control circuit, so it was just breadboarded. See pic20.