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
['d2 e f2 d', 'AcA AcA']  
X:1
L:1/8
M:6/8
K:D
 d2 e f2 d | egf edc | d2 e f2 d | gec d3 | d2 e f2 d | egf edc | a2 f g2 d | gec d3 :: f2 A AcA | 
 AcA AcA | f2 A AcA | ABc d3 | f2 A AcA | AcA AcA | a2 f g2 e | gec d3 :|  