Here is the new accompaniment figure for the "A" section. Rhythmically, it's just about the same as before, but instead of working with a specific group of pitches, I've just picked notes and chords that I thought would sound good. The less time I have, the more intuitive I have to be...nothing wrong with that, I guess?
It's a two-bar cycle that repeats as many times as necessary:

On top of that I then added a melody, just like I had done before. Again, I let myself use any available pitches. However, I knew I wanted something with a little bebop feel. Rhythmically, I wanted the melody to complement what the accompaniment was already doing.

For the moment, my idea is to save all of this for the second "A" section, since I don't want to give away too much at the beginning. Instead the first "A" section, which starts the whole piece, will be some kind of reduced version of this material. Perhaps only some of the parts, or something.