Craft a musical composition with the supplied motif and conforming to the necessary format.
X:1
L:1/8
Q:3/8=120
M:6/8
K:Bb
['B2 d fdB']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:Bb
 B2 d | fdB bge | f3 B2 d | fdB ecA | B2 F B2 d | fdB bge | f3 B2 d | fdB ecA | B3 |:  