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
['DEF FEF', 'f ecA', 'd dFF FEF']  
X:1
L:1/8
M:6/8
K:D
 F/E/ | DEF FEF | AFF F2 E | DEF FEF | AFE E2 F | DEF FEF | AFA d2 d | cBA BAF | AFE E2 :: f | 
 ecA ABA ecA A2 f | ecA Ace | fdB B2 f | ecA fdB | ecA a^gf | ecA BAF | AFE E2 :: d | dFF FEF | 
 AFF F2 d | dFF FEF | AFE E2 d | dFF FEF | AFA d2 d | cBA BAF | AFE E2 :|  