Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:2/4
K:F
['AA/c/Ac d d2 f cfd/c/A/c/ G4 cAfd/c/']  
X:1
L:1/8
M:2/4
K:F
 AA/c/Ac | d d2 f | cfd/c/A/c/ | G4 | cAfd/c/ | Ac F2 | GGGC | D2 GF/G/ | D2 z2 |]  