First as a solo idea, using the extremely useful RLB (B = bass drum) sticking in the first half, and LRB in the second half. No reason not to do these substituting the hihat played with the foot for the bass drum. Or both feet in unison— something I'm doing a lot lately. After learning the basic exercise, you should move your hands around the drums, of course.
The same basic idea in context of a time feel, played along with a cymbal rhythm— first with snare drum and bass drum, then with snare drum and hihat:
You could extend either of these to drill each individual inversion by repeating the triplet measures, or by extending one of the 16th note measures into 6/4:
You only have to do one of them— as independence practice, at least— because that includes all inversions of the pattern against the cymbal rhythm.