Music Composition for Dummies

I've been looking for some simple, yet lovely, music composition software -- to feed my need for ... what rhymes with 'eed' but means 'expressing myself with music'?

Anyhow, I found a piece of software called MusiGenesis

It creates patterns in rhythm or instrumental tracks and then allows you to 'evolve' the tracks through 'mutation'.

Pretty cool -- best suited for creating mind-altering trance tracks.