Hmm, I was hoping @Richard_Townsend would stop by again and show us how this is done musically. As far as I can tell, @chalkwalk came closest to a strict musical interpretation – and pulled it off with aplomb. @RPLKTR’s interpretation was even more in keeping with the idea of continual change, but 2/3 parts being drums and samples reduces the degree of difficulty substantially.
I think if I were to approach this again I would do something Reich-like – a rhythmic pattern of notes with subtle changes, something like that Vanilla Ice interview where the extra “ding” makes it different – and then it could go on forever (there is a guy called Donnelly who composes like this – for trios even, sounding like Reich doing an Irish jig).
Otherwise, yeah… very difficult! Maybe those generative tools in Ableton would come in handy? I’ve yet to use them…