Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:9/8
K:G
['', 'B2 d', 'B2 d cAF G2']  
X:1
L:1/8
M:9/8
K:G
 D |: G2 c BGB c2 A | B2 d cAG F2 D | G2 c BGB c2 A |1 B2 d cAF G2 D :|2 B2 d cAF G2 B |: 
 ABA AFD FED | ABA AFD G2 B | ABA AFD FED |1 B2 d cAF G2 B :|2 B2 d cAF G2 D ||  