Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
M:6/8
K:G
['GBA G2 B', 'efe edB']  
X:1
L:1/8
M:6/8
K:G
 GBA G2 B | def gdB | GBA G2 B | AFD AFD | GBA G2 B | def gfg | ege dBA | BGG G3 :: efe edB | 
 def gfg | efe edB | dBA ABd | efe edB | def geg | ege dBA | BGG G3 :|  