Create a musical composition that conveys a sense of melancholy and loneliness through a slow and mournful progression of notes. Aim to evoke feelings of sorrow and solitude using a combination of sustained and descending melodies. Consider incorporating minor chords or intervals to deepen the emotional impact of the composition. Focus on creating an atmosphere that reflects a somber state of mind and introspection, capturing the essence of low valence and low arousal levels in the music.