Compose melodious music utilizing the prescribed letter representation and integrating the given thematic element.
X:1
L:1/8
Q:3/4=50
M:3/4
K:G
['GB B2 GB dc Bd ed cB', 'BG EF']  
X:1
L:1/8
Q:3/4=50
M:3/4
K:G
 GB dc"^qu" B2 | GB dc Bd | ed cB A2 | BG GD EG :: BG EF G2 | BG EF GA | BG EF G2 | AB cB FD :|  