Click the green flag to see and hear the cats play. Change the tempo if you like. If you look inside, there is a simple editor for making your own rhythms :)
Thanks to Dr_Lego for the original project Percussion Pattern (Scratchtober): https://scratch.mit.edu/projects/746350859 I replaced @Dr_Lego's wonderful BeepBox beat with Music extension drums. The beat I made is nothing special, but it is easy to edit it to create your own drum beat :)