Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/8
M:3/4
K:G
['B3 A']  
X:1
L:1/8
M:3/4
K:G
 dc | B3 A G2 | A d3 e2 | B d3 F2 | A2 G2 G2 | G2 B2 d2 | e f3 g2 | f2 d2 e2 | f d3 d2 | g3 a f2 | 
 g2 d2 Bd | c3 B c2 | d B3 GA | B3 A B2 | c3 d c2 | B2 F2 A2 | A G3 ||  