What we want to do here is have our external background loop load into our main movie clip and run independently from it. So, lets open the first movie we made with our scenes.
We only want our loop movie to be loaded once. This is the reason for having our load action in the first frame and our menu on the second. So we created a frame for the movie to be loaded on. The main movie loads the sound movie and goes to the next frame. This frame has our buttons and the stop command. The home button has an action to go to the second frame of the Home scene, rather than the first which would reload the sound movie, causing a break in the track and an additional track to play, producing and echo. This is the only scene that has 2 frames, and the Home button is the only button directed to the second frame of it's scene.