Generate a music composition prompt according to low valence and low arousal levels based on the provided ABC musical notation:

Compose a slow and mournful piece that conveys a sense of deep sorrow and contemplation. Capture the feelings of melancholy and restraint through the use of a gentle and understated melody. Explore the depths of sadness and introspection in your composition, evoking a somber atmosphere that invites introspection and reflection.