Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/4
M:2/4
K:Eb
['G2 G B']  
X:1
L:1/4
M:2/4
K:Eb
 E G | G2 | G B | B2 | e B | G2 | G B | E2 |]  