Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
M:4/4
K:G
['GBdg edcB', 'gdga (3gab ag']  
X:1
L:1/8
M:4/4
K:G
 D | GBdg edcB | gbag aAAB | GBdg edcB | cAdc BG G2 :| gdga (3gab ag | fdad bdad | gdga (3gab ag | 
 dgfa g2 g2 | gdga (3gab ag | agab c'2 d'a | gedc Bdge | dBcA G2 G2 :|  