Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/4=120
M:6/8
K:G
['G2 G G2 g ege dBG', 'd2 g']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:G
 D | G2 G G2 g | ege dBG | cde dBG | EAA A2 B | G2 G G2 g | ege dBG | ABc BAG | EGG G2 :: (B/c/) | 
 d2 g e2 g | d2 g dBG | c2 d dBG | EAA ABc | dgg egg | dgg dBG | ABc BAG | EGG G2 :|  