Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['D2 FA', 'afed efed']  
X:1
L:1/8
M:4/4
K:D
 D2 FA DAFA | dfed ABdB | A3 B AFED | EFED BAFE | D2 FA DAFA | dfed ABdB | A2 AB AFED |1 
 EFED D2 FA :|2 EFED D4 || Addc defg | a2 ba afed | efed BA (3Bcd | efed BAFA | d3 c defg | 
 a3 b afed | efed BAdB |1 AFED D4 :|2 AFED D2 FA ||  