GD::Graph is really nice. You will need to install GD as well. I recommend you install the latest version (2.06 as of the date of this node) which requires libgd version 2.0.5 or higher (which you can get at http://www.boutell.com/gd/)

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)