Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:4/4
K:D
['DFAF A,CEC DFAc', 'cABc dAbA afgf eddd cega fddd deff']  
X:1
L:1/8
M:4/4
K:D
|: DFAF A,CEC | DFAc d2 cd | Bggg gbed | cAed cAGE | DFAF A,CEC | DFAc dced | cAA^G ABA=G |1 
 (3FGA EC DDDD :|2 (3FGA EC DEFA |: ddba afgf | eddd cABc | dAbA afgf | eddd cega | fddd deff | 
 ecA^G ABcA | BGGG GABF |1 AFEF DEFA :|2 AFEF DA,B,C ||  