Illumination for my Burning Man Bike, the Peacock tail has undergone several iterations. Who knows, maybe someday I'll build the rest of the Peacock!
Me and my bike, Burning Man 2015. The costume is also my construction; Neopixel LEDs, EL wire and tape.
2014 version: The Peacock Tail as spectrum analyzer (code courtesy of Adafruit).
2013 version: Before I learned how to do the spectrum analyzer trick, all "feathers" of the tail responded to music in concert.