Put it in your "Ideas" folder and keep it for later.
Actually I don't have any "ideas" folder because most of the time I just title ideas as... "idea".
But my compositions folders are organized according to the period of creation
(by period I mean... new level in musical development, last time I opened a new folder was after the first time an orchestra performed my piece)
so they look that way:
but you might consider creating an "ideas" folder.
When I can't come up with a new thing I just look for a project named "idea" and start from there.
You can do whatever you want. If you consider de Db as C#_
Tonal: Cmaj: C - A ...... (Dm)..
Modal: E dorian: Em - A
Or if you prefer, consider it as non functional.
You can write a fugue, a canon, or what you want. As it is, it is only an ambiguous phrase.
It doesn't really make much sense. Assuming this is tonal music, you have a leap in the melody on the fourth rhythmic unit of 16 notes, you use a Db followed by E natural in the next measure creating an augmented second, and the harmonic center seems to shift in the middle of the first bar.
Hello!
I would like to show you my new piece for piano and electronics. I'm waiting for your feedback and hopefully you enjoy it!
Self-portrait (piano / electronics) - Antonio García (YouTube link)