Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/8=160
M:9/8
K:G
['GAB EFE', 'GAB BdB']  
X:1
L:1/8
Q:1/8=160
M:9/8
K:G
 GAB EFE EFE | GAB EFE AFD | GAB EFE EFE | FED AdB AFD :| GAB BdB BdB | GAB BdB AFD | GAB BdB BdB | 
 cBA AdB AFD :|  