This is actually pretty cute, I just wish there was perhaps a "patience" mode that would just be a slower version of the screensaver mode. I'd love to leave this on my second display and let it grow over the course of an hour or a work day.
-t, --time=TIME in live mode, wait TIME secs between steps of growthYou can change the number to 10 if you want an even slower one, but 5 was good for me.