Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:6/8
K:G
['B2 c ded cBA G2 B', 'd d^cd', 'd d^cd']  
X:1
L:1/8
M:6/8
K:G
|: B2 c | ded cBA | G2 B BAG | F2 A c2 e | d2 B B2 c | ded cBA | G2 B d2 g | fed cBA | G3 :: G2 A | 
 B2 B BAB | c2 F F2 c | c2 c cBc | d2 z def | gfe dcB | A3 f2 e | ded cBA |1 G3 :|2 G2 d d^cd |: 
 B2 d d^cd | c2 d d^cd | c2 d c2 d | B2 d d^cd | B2 d d^cd | c2 d d^cd | fed cBA |1 G2 d d^cd :|2 
 G3 ||  