@tambouri actually, what Laborcamp is doing there would satisfy what I’m looking for. I now remember recreating some form of this patch a few weeks ago, but when I’ve been experimenting lately I’ve been running into trouble.
I think the missing link is: if you are going to use/advance multiple patterns, you need to add a P.N x command before each P.NEXT command. If you don’t, a ‘dangling’ P.NEXT will just switch to whatever pattern does get a P.N command.
Thanks for reminding me of that video!