Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/16
M:2/4
K:F
['c2 A2']  
X:1
L:1/16
M:2/4
K:F
 c2 d f c2 A2 | d2 f2 d2 c2 | A2 c2 A G F2 | G3 A G4 | c2 c A c2 d2 | D F C D F3 G | 
 A c A G F G D2 | C8 |]  