Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:G
['D/E/F GFGB AGED GBdg e2 d/e/f gfgd', 'gfgd edBG']  
X:1
L:1/8
M:4/4
K:G
 D/E/F | GFGB AGED | GBdg e2 d/e/f | gfgd edBG | ABAG E2 D/E/F | GFGB AGED | GBdg e2 d/e/f | 
 gfgd edBG | AGEF G2 :: Bd | gfeg fedf | edef edBd | gfgd edBG | ABAG E2 D/E/F | GFGB AGED | 
 GBdg e2 d/e/f | gfgd edBG | AGEF G2 :|  