Rlr Lrl Rlr Lrl | Rlr Lrl Rlr Lrl | rLr lRl rLr lRl | rLr lRl rLr lRl | rlR lrL rlR lrL | rlR lrL rlR lrL | RLR LRL RLR LRL | REPEAT.
This accent pattern also works well by doing it on one hand. I built up my singles by doing it one time through with the right hand, then repeated by doing the same pattern as a skeleton pattern for sextuplets (just add left-hand grace notes). Then do the same pattern with the left-hand and left-hand lead. If you have a weak hand, focus on accenting with that hand.
I also know of two cool extensions to the pattern that go like this:
(1) | Rlr Lrl rLr lRl | rlR lrL Rlr Lrl | rLr lRl rlR lrL |
(2) | Rlr lRl rlR Lrl | rLr lrL Rlr lRl | rlR Lrl rLr lrL| R ...
I usually play the pattern you wrote out fluidly with the above two patterns for practice. My routine is to play first only the right hand, then only the left hand. Then I play with right-hand lead, then left-hand lead. After that, I alternate lead hands with the following additions:
* Drags on the accents
* Tap rolls
* Flams on the accents
* Paradiddles (great for strength triplet double-strokes, because you really have to focus on the accents)
If I'm feeling really ambititious, I will try 32-note triplets (with varied sticking) with the same triplet accents. I have to be really loose to try that, though.
