Craft a musical composition that incorporates the supplied alphabet sequence and motif.
X:1
L:1/4
M:3/4
K:G
['d c B2']  
X:1
L:1/4
M:3/4
K:G
 G | B G B | d2 A/c/ | e d c | B2 B | d d c | B2 G/G/ | c B A | G2 |]  