Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:6/8
K:D
['A dfa dfa dcd ecA dfa efg', 'd2 f/g/ aba gag fdf ecA ava']  
X:1
L:1/8
M:6/8
K:D
 A | dfa dfa | dcd ecA | dfa efg | fdd d2 :: f/g/ | aba gag | fdf ecA | ava geg | fdd d2 :|  