I was doing something else (read: I was supposed to be doing something else, not procrastinating with synths), and had norns running Blippoo in the background, with NTS-1 providing reverb plus an arp sequence. The arp got distractingly boring after a while, so I live-coded a teeny tiny movement for it.
Norns allows programming on the REPL while scripts are running. I wrote the following:
arp = midi.connect()
arp_note = 40
arp_move = function() new_arp = arp_note + math.floor(math.random() * 10); print(new_arp); arp:note_on(new_arp) end
m = metro.init(arp_move, 10)
m:start()
Simple, but that’s a whole afternoon’s worth of generated music right there.
This shifts the arp sequence randomly between MIDI notes 40 and 50 every 10 seconds while I try to get to do that thing that I was actually doing, which wasn’t norns programming, nor posting to llllllllines 
This is, literally, house music, right?