Compose a piece of music following the given alphabetical representation of the musical structure and the provided motif.
X:1
L:1/4
M:3/2
K:G
['B3/2 c/ d B A G', 'B3/2 c/ d e f']  
X:1
L:1/4
M:3/2
K:G
 B3/2 c/ d B A G | F A2 B c A | B3/2 c/ d B A G | D G2 B A G :: B3/2 c/ d e f g | a A2 c B A | 
 B3/2 c/ d e f a | g G2 B A G :|  