Craft a musical composition with the supplied motif and conforming to the necessary format.
X:1
L:1/8
M:2/4
K:Bb
['B,>B, B,>A, B,2 B,>A, |]:', 'B,>A, B,B, B,>A, B,4 (3B,A,A, A,2 ||[M:3/4]', '', 'G,>G, G,>A, A,<G, G,>G, G,'  
X:1
L:1/8
M:2/4
K:Bb
 B,>B, B,>A, | B,2 B,>A, |]: B,B, B,>A, | B,B, B,>A, | B,4 | (3B,A,A, A,2 ||[M:3/4] G,>D, D,4 || 
[M:2/4] G,>G, B,>B, | A,/G,/G, G,>G, | G,>A, A,<G, | G,>G, G, z :|  