Marimba piece in G major

The task

Compose a marimba piece in G major, 132 BPM allegro, 4/4, about 88 bars and about three and a half minutes, scored for marimba and bass in 2 voices. Texture: a sixteenth-note marimba ostinato. Open with 4 bars establishing the accompaniment before the melody enters on an upbeat. The main section runs on a 8-bar…