All grids share the concept of shifting an embellishment across different partials of a rhythm or rudiment. There are thousands of formulas and combinations utilizing this concept that help supplement drummers seeking to develop accuracy, fluidity, and rhythmic comprehension.
A basic 4-2-1 grid could implement single stroke sixteenth notes with a shifting accent:
1. ) Play each pattern four times.
2. ) Play each pattern two times.
3. ) Repeat step 2.
4. ) Play each pattern one time.
5. ) Repeat step 4.
A.) First Pattern - Accent falls on the downbeat (the first partial or sixteenth note).
B.) Second Pattern - Accent shifts to the right (or the "e" of the beat).
C.) Third Pattern - Accent shifts to the next sixteenth note (or the "&" of the beat).
D.) Final Pattern - Accent shifts to the last sixteenth note (or the "a" of the beat).