Craft a musical composition that incorporates the supplied alphabet sequence and motif.
X:1
L:1/4
M:4/4
K:G
['G B (3B/c/B/ A/B/ c A A', 'G B']  
X:1
L:1/4
M:4/4
K:G
|: G B (3B/c/B/ A/B/ | c A A B/c/ | d e/d/ c A/c/ | A G G2 :: e d d G | B B B2 | e d d G | B A G2 | 
 G B B B/d/ | c A A B | c e/e/ d c | B G G2 :|  