I applied Samer’s patch to Dan’s interval program (per forum post viewtopic.php?f=2&t=154&start=40#p781) and checked it in to GitHub.
https://github.com/rayshobby/opensprinkler/tree/master/OpenSprinkler%20Pi/software/demos/interval_program
So it’s less confusion to anyone who is new to this thread. Sorry about the delay.