Using three arms, sine, and cosine, this project creates beautiful art. Hit space to change backgrounds, c to clear, and h to hide the arms. You can change the rotation speed of any of the arms to create different artwork. ©Firedrake969 2013, some rights reserved. FEATURED! 3/25/13 Nerdsville rainbow remix - thanks for your lovely program. We've remixed it so you can change the pen colour or hold down the R key for a rainbow of random colour.