Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:4/4
K:D
['F/G/ AABG cAA(F/G/) AABG FD(DF/G/) AABG cAAB/c/', 'df g/f/e/d/']  
X:1
L:1/8
M:4/4
K:D
 F/G/ | AABG cAA(F/G/) | AABG FD(DF/G/) | AABG cAAB/c/ | dABG FDD :: c | df g/f/e/d/ ce f/e/d/c/ | 
 df g/f/e/d/ cAAc | df g/f/e/d/ ce f/e/d/c/ | dABG FDD :|  