Develop a piece of music conforming to the stated structure and theme.
X:1
L:1/8
Q:1/8=128
M:4/4
K:Bb
['B>c B>F G<B F>D']  
X:1
L:1/8
Q:1/8=128
M:4/4
K:Bb
|: F | B>c B>F G<B F>D | E>G F>D G<C C>A | B>c B>F G<B F>D | E>g f>e d<B BF | B>c B>F G<B F>D | 
 E>G F>D G<C C>A | B>c B>F G<B F>D | E>g f>e d<B Bf | d>B F>B D>B F>B | d>B F>B d<c c>f | 
 d>B F>B D>B F>B | d<f b>f d<B B>f | b>B a>A g>G f>F | e>E d>D c<C C>E | D<F F>D E<G G>E | 
 e<g f>e d<B B :|  