Compose a piece of music that adheres to the specified alphabetical framework and includes the provided theme.
X:1
L:1/8
M:6/8
K:G
['', 'BAG Bcd edc efg dcB gdB', 'efg dcB gdB']  
X:1
L:1/8
M:6/8
K:G
 dc |: BAG Bcd | edc efg | dcB gdB | A3 ABc | BAG Bcd | edc efg | dcB gdB | cAF G2 :| f | g3 bag | 
 fed efg | dcB gdB | A3 ABd | g3 bag | fed efg | dcB gdB | cAF GBd | g3 bag | fed efg | dcB gdB | 
 ABA ABc | BAG Bcd | e2 d efg | dcB gdB | cAF G2 ||  