Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
M:9/8
K:G
['BAG GAG GDG', 'd2 d BGG']  
X:1
L:1/8
M:9/8
K:G
 BAG GAG GDG | BAG GDG ABc | BAG GAG GDG | cAF FAF ABc :| d2 d BGG BGG | d2 d BGG ABc | 
 d2 d BGG BGG | cAF FAF ABc :|  