We were discussing blues changes. So I put this together. It's a blues in Bb, sort of. It starts on Bb but ends on F#, pretty much a C whole-tone scale sort of thing works fine throughout.
It's called "Henri the Horse."
Interesting piece. From a theory POV I would write the F#7 as Gb7 and the final B nat. as a C flat.
What do you mean by "pretty much a C whole-tone scale sort of thing works fine throughout" That you can improvise on a whole tone scale?