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:G
['DEG Bcd cee', 'def gfe dBG', 'AGE DEG BGG dBG BAG g3 dBG']  
X:1
L:1/8
M:6/8
K:G
 DEG Bcd | cee Bdd | DEG BdB | AGE GED | DEG Bcd | cee B3 | g3 dBG |1 AGF G2 E :|2 AGF G3 |: 
 g3 ded | B3 def | gfe dBG | AGE GED | g3 ded | BGB def | gfe dBG |1 AGF G3 :|2 AGF G2 E |: 
 DEG BGG | dBG AGE | DEG BAG | ABA AGE | DEG BGG | dBG BAG | g3 dBG | AGF G2 E :|  