So, chipuni gave a challenge to everyone and their dog, consisting of these rules...
1. Score (ie: write out) a piece of music that is purely percussive.
2. Do not repeat any structure more than three times in a row, and do not use any structure more than six times in the piece as a whole.
3. Record what you've written. Feel free to use multiple "takes" and to use multiple layers.

And I decided to give the 'challenge' a try!!!
1. I did correctly
2. I did, although each 'structure' is a bar long and each 'structure' is different for each percussive instrument.
3. I have no recording equipment, so the computer played it!

Hope this actually counts! Enjoy!!!