Here's a fun challenge! This is an idea that I got from great NYC drummer/teacher Cliff Almond. You take a basic paradiddle (RLRR LRLL) and work it through metric modulation with a half note click. I think I did this at 60bpm. It's a great way to free your mind from the time and learn how to play a mixed sticking through different groupings. It sounds really interesting spread out over the kit. Check it out and try it!