Music Project

I am starting a project, because I am bored and because I like music, I'm doing a music one. Okay here goes:

The rules are thus,

1. It must be music. (Well, duh)
2. It must be one solo instrument
3. It can only use the pentatonic notes, that's the black keys on a piano. The pentatonic notes are C# D# F# G# and A#.
4. It can be any genre, except rap obviously.

The entries are to be posted on youtube or soundcloud. It would be preferable to provide a MIDI file as well, so I can make sure you didn't use any other notes. If you have any questions then just ask.