Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/4
M:none
K:D
['F E']  
X:1
L:1/4
M:none
K:D
 F F E | D2 D E/F/ A | F2 z A F E | D2 D E F A | F2 z E | F/F/ E F/F/G/G/ | A2 F2 z A F E | 
 D2 D D E F G/F/ | E2 D/E/ F E D | F A F E | D3 |]  