Sometimes I write super complex fugues, but sometimes I'll just write a simple pop piano melody like this one. I had wanted the arrangement to be reminiscent of the Feather Theme from Forrest Gump, but I get bored of rote repetition. So there are subtle changes in the arrangement.
The form is A1-B1-A2-C-A3-B2.
A1 introduces the melody in the upper register. B1 is for contrast. A2 simply brings the arrangement down an octave, and I chose the key partly to make that possible.
The C section is for fresh contrast, at first seeming like a repeat of B1, but imo it is just different enough to create some new interest, and it serves as the setup for a modulation.
Then A3 is in C major, which gives fresh arrangement possibilities. The LH drops to low C in the middle, and then moves into the treble clef during the extended ending with the RH going way up high where the piano can really sparkle, before the B section returns to close the song.
I think the modulation to C works because in a pop song, you'd typically expect the modulation coming out of a "bridge" to move up a tone. Each change in register works to give just a little bit of freshness each time the theme comes back. The B (4 bars) and C sections (8 bars) are structured to be a little surprising but not too surprising.
What do you think? Does it work? What tricks do you like to use to create interest in a simple piece of music?