Great job!! I enjoyed listening to your piece, and I don't have much feedback, but I'll start with this : WRITE MORE!! This has the potential to be even better than it is now. I know it's for an assignment, but if you have time, I would consider adding to it. One thing I noticed is how stagnant most of your parts are for the majority of the piece, your contrabass stays on pedal tones, and your violin 2 and viola stay on double stops pretty much the whole time. Which isn't a bad thing, just something I noticed - they could be more active and have more movement, while still supporting the harmony. Something else I would add is getting away from the clean breaks between ideas. For example your viola plays repeated notes until m.8 when they switch to another rhythmic idea, maybe there's a way to hint at this before the idea comes in concretely (this may be something you explore if you decide to add to the piece). Great job & happy composing!!