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If you have an android phone, download this app, put headphones on, and draw the music. It's amazing.
There are some interesting brushes, and as you continue to draw, the older stuff disappears. All you have to do is save the cool ones, and keep going!
If you have an android phone, download CraZe. It's a fun drawing app that let's you draw forever. The older stuff disappears as you draw more. Just play with the brush settings, and hit the save button every once in a while.
If you draw to music, it's like a visualizer.