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
['A2 AA B2', 'd2 fded']  
X:1
L:1/8
M:4/4
K:D
 F | A2 AA B2 AF | DFAF EDB,B | A2 AA B2 AB | dBAF EF D :| c | d2 fded fd | d2 fd B2 Bc | 
 d2 fded Bc | dBAF EFDc | d2 fded fd | d2 fdBA (3Bcd | g2 fedB AB | dBAF EF D ||  