Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
Q:3/8=100
M:9/8
K:D
['FAd FAd', 'dcd dcB', 'F3 G3 AFD']  
X:1
L:1/8
Q:3/8=100
M:9/8
K:D
 FAd FAd AFD | FAd FAd c2 A | FAd FAd AFD | GFG EAG F2 D :: dcd dcB FAD | dcd egf g2 e | 
 dcd dcB AFD | GFG EAG F2 D :: F3 G3 AFD | FGA ABc B2 G | F3 G3 AFD | dcB AFA F2 D :|  