Run a demo animation using aaronjasso's Cordwood library
Here's a quick video showing it in action..
This is just a quick test.
I'm using The Cuttle, but any Arduino would do.
Since The Cuttle pins are aligned identically to the ATmega328 pins, the sketch uses the analog pins for digital out, as they are the only 6 GPIO pins in an unbroken sequence.
See the ATmega168/328-Arduino Pin Mapping for details on mapping the ATmega328 pins to Arduino port names.