Adjust the sliders, click the green flag, sit back, enjoy. Try different values for different results. Some nice angles to get you started: 20, 44, 59, 89, 179. Please check out the nice remixes made by other scratchers: https://scratch.mit.edu/studios/27457559/ And of course, feel free to remix yourself!
I made new costumes - all red circles (except a few black). I also switched the "next costume" block for something more random using the timer. I also added fade in/out when switching costumes, and a slider to let you control the initial rotation angle. There are actually more blocks, but only 34 of them are for the graphic effects - the rest are for showing/hiding the slider and playing the sounds. Thanks to @PinkyPepper for suggesting I add music! The music is "Slow Motion" by Bensound: www.bensound.com