Added some AI!

Hey man, I loved your tie so much I made my own, maybe you'll find it interesting! I'm running off a Teensy 2.0 so I've got more flash(32kb) and ram(2.5k), and I've kind of hacked in a super basic AI into this. Perhaps you don't want to pull any of the changes, but I thought you might find it cool anyway. Sadly, it's not super efficient. Using the fastspi2 library it clocks in at 17kb for me, but using the ws2811 library you had comes in at under 8KB, which probably won't fit on your digispark.

Anyway man, thanks for the inspiration and the sheer fun I've had over the past two days playing with this!