A fair start...
I have a feeling you didn't want the music to play over its self and build up like that, but its a nice start in flash none the less! What you want to do so the music doesn't stack like that is:
1.go to window>actions
2.go to the timeline, and left click the last keyframe and make it a keyframe if its not already.
3.Be sure that keyframe is selected, go back to actions and click script assist
4.Click the plus in actions>global functions>timeline control> go to
5. Be sure its go to and play, and it goes to frame 2!
6.Make sure your music starts on frame 1.
7.(ctrl+enter) to test movie
It should now loop but not loop the music!