Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:6/8
K:D
['B Add def fed cde fdB', 'd AFF FED']  
X:1
L:1/8
M:6/8
K:D
 B | Add def | fed cde | fdB Bcd | cAF F2 B | Add def | fed cde | fdB ecA | B3 B2 :: d | AFF FED | 
 ABA A2 d | AFF FED | BcB B2 d | AFF FED | AFA dfa | fdB ecA | B3 B2 :|  