How do you run two runnables at the same time? Like, chords for the left hand, and then the melody for the right?
start
chunk lefthand
play C3, Eb3, G3 for 2b
rest for 2b
endchunk
chunk righthand
play C3 for 1b
play Gb3 for 1b
play Eb3 for 1b
play Db3 for 1b
endchunk
run lefthand with loop for 100
run righthand with loop for 100
finish