Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/16
Q:1/4=200
M:4/4
K:D
['D2FA d2de', 'fedB ABde']  
X:1
L:1/16
Q:1/4=200
M:4/4
K:D
 (FE) | D2FA d2de | d2D2 FGAF | EGBd efgf | edcB AGFE | D2FA d2de | fedc d2dA | BcdB ABAG | 
 F2D2D2 :: (de) | fedB ABde | fedc d2dA | BABd ABde | f2e2 e2(de) | fedB ABde | faef d2dA | 
 BcdB ABAG | F2D2D2 :|  