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:C
['C D2']  
X:1
L:1/8
M:6/8
K:C
 G, | C2 B, C2 D | E2 F E2 C | D2 C D2 E | D3 C2 G, | C2 B, C2 D | E2 F E2 C | D2 C D2 E | D3 C2 |]  