Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:2/2
K:D
['D3 E FEFA', 'gf e3 f gfed (3Bcd ef g2']  
X:1
L:1/8
M:2/2
K:D
|: D3 E FEFA | d F3 BFAF | E3 F GFGA | BdAF GFEF | D3 E FEFA | B F3 ABde | f2 ef dBAG |1 
 FAEA D2 FE :|2 F2 EF D2 fe |: defg afdf | afdf a2 gf | e3 f gfed | (3Bcd ef g2 fe | defg afdf | 
 afdf a2 ag | f2 ef dBAG | F2 EF D4 :|  