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, evoking a mood of quiet sadness and reflection.Prioritize soft dynamics and subtle harmonic progressions to create an atmosphere of introspection and emotional depth.