Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/4
Q:1/4=120
M:2/4
K:Bb
['B B']  
X:1
L:1/4
Q:1/4=120
M:2/4
K:Bb
 F3 F | B B B B | A F F F | B B d B | A2 c A | G G G G | A A c A | G2 G G | F7/4 ||  