Having some issues with the structure of a composition.
I have an intro melody (plays through twice)
then I have what I guess we call a bridge melody which sits on the same basic chords of the intro melody - run through this twice.
Then I repeat the above. May sound boring and repetitious, but it sounds ok. More instruments come in etc., and it seems to work.
Then I finally get to the main theme (what is this part called, the hook, maybe)? Chord progressions change under the main theme. Run through this part two or three times.
What does compostion structure say I should do next? Do I go back to the intro, or do I go back to the bridge melody? Or how about I incorporate the intro and bridge melodies together? Which I can easily do as they use the same base chords.
Any rules we look to?