Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:3/4
K:Bb
['DFBFDF EGBGEG FAcecA', 'AcecAc BdfdBd']  
X:1
L:1/8
M:3/4
K:Bb
 DFBFDF | EGBGEG | FAcecA | BdfdBF | DFBFDF | EGBGEG | FAcecA | B4 z2 :: AcecAc | BdfdBd | cegedc | 
 Bdfgab | AcecAc | BdfdBd | cegecA | B4 z2 :|  