Just for documenting better, sometimes the program just stop responding for a while, but sometimes i get something like this and i have to replay:
then i tried your code and improves the behaviour but still stop for a while, now i installed the last version of sonic pi, have some troubles booting but finally it opens and your code works great, now it rocks, this is how the “Percutarra” (Drumitar)look and sound. Thank you so much RN and SA.
click here for listen: test_percutarra