You can get started with the code i provided for the Personal Nodelet Extractor. It does not use any hierarchical system, but feel free to add one. Mi casa su casa!

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)