I once wrote a computer program in Java that generated this 16-minute song. People who listened to it told me it sounded like a car chase. Some of it sounds wonky, and some of it sounds really cool. Take what you want. Leave the rest. This was back in 2003 or so. I wrote it in Eclipse, used MidiSynth.java and JavaSoundDemo, and generated the letter notes in a determinate pattern that was not technically repetitive if you knew how to parse the sections, however the sections bleed into each other giving an auditory illusion of repetition. Based on A-Star Search, I would be interested if music majors (or just people with a good ear!) can discern my pattern algorithm. Another thing to try is to play multiple instances of this song offset by different delays. It can sound either like a crazy person banging on keys or sound like a genius composition of an odd sway to and from chordal harmony. You can acheive multiple instances by simply opening up multiple browser tabs playing the MIDI file.