Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:4/4
K:G
['(3GAB cEED EFGE DE (3GAB c3 A', 'G2 Bd e2 ed efge dB (3GAB']  
X:1
L:1/8
M:4/4
K:G
|: (3GAB | cEED EFGE | DE (3GAB c3 A | BAGE D2 EG | A2 AB ADGA | BAGE DEDE | G2 GA G2 :: Bd | 
 e2 ed efge | dB (3GAB c3 A | BAGE D2 EG | A2 AB ADGA | BAGE DEDE | G2 GA G2 :|  