Construct a musical composition following the designated musical form and incorporating the given motif.
X:1
L:1/8
Q:1/8=128
M:4/4
K:Bb
['f<B d>c B2']  
X:1
L:1/8
Q:1/8=128
M:4/4
K:Bb
|: b | f<B d>c B2 F>B | e>g d>f g<c c>b | f<B d>c B2 FB | e<g f>e d<B Bb | f<B d>c B2 F>B | 
 e>g d>f g<c c>b | f<B d>c B2 FB | e<g f>e d<B Be | d>f B>f d<f b>f | d>f B>d c<F F>d | 
 B>f d>f B>c d>c | B>G F>E D<B, B,>d | B>f d>f B<f b>f | e>c d>B c<C C>a | 
 b/a/g/f/ g/f/e/d/ c>B c>d | G>c B/A/G/F/ B3 :|  