Click to view score for short_assignment3A_pt4.
I think I got carried away with my writing because although you had asked for only 12 measures I continued writing more and more since I realize that 3/4 has fewer beats than 4/4. But then I decided that there are two distinct movements here, so that is why I put A and B in boxed text. Those are the two movements. My next assignment after this will include a third movement.
Click to listen at https://soundcloud.com/madmetalmage/short-assignment3a-pt4 .