Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:6/8
K:G
['GFE d2 d edB', 'Bef gfe f2 f edB']  
X:1
L:1/8
M:6/8
K:G
|: BEE GFE | d2 d edB | AF{G}F DFF | AFA dAF | B2 E GFE | d2 d edB | AFA dAF | FED E3 :: Bef gfe | 
 f2 f edB | BAF FEF | DFA BAF | Bef gfe | f2 f edB | BAB dAF | FED E3 :|  