As an attempt to let my computer work for me while I do something else, I automated the mouse for it to move and click randomly (or almost randomly) on everything.
Then I opened Ableton Live and let it do whatever it wanted for a few hours.




Here is the Processing applet I used (though some parameters in here might be very specific to my own computer).

And here is the result of one of the sessinos :





Some years later I've developped this concept further with the use of keyloggers :