Going all Michael Craig Martin (Only not as good)

Well, this Steve Reich album artwork project is proving trickier than I thought, and the deadline is rushing up at me, so I spent quite a while pondering today, and considering ideas for the four pp centre spread of my 16pp booklet. I wanted it to be based around the clapping song and the piano phasing song, and I was interested how in both songs, patterns appear and disappear in the music.
I drew this piano.

I also drew some clapping hands. Then, as you see below, did some nifty intermingling. (Is that even a word?)
I have been told off for being too literal though, so this may be bad.
Working progress. Click for full view.