Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/4
M:3/2
K:G
['G B']  
X:1
L:1/4
M:3/2
K:G
 G | B B B3 G | A E G3 G | B d d3 B/A/ | B d3 d | e d B3 B | d B/A/ G3 G | B A G3 D | E G3 z |]  