...what's the best way to make them?

thanks!

I usually use the |until| object for any sort of looping. Be warned though, if you bang an |until| without having anything set up to give the number its waiting for to break the loop you will end up freezing pd into an unbreakable infinite loop. The best way to use until is to send it a message with the number of repetitions required instead of straight up banging it.