Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
Q:1/8=128
M:4/4
K:G
['B>c d>c']  
X:1
L:1/8
Q:1/8=128
M:4/4
K:G
|: B>c d>c B<G (3(G/A/B/) | c>B A>G F<D D2 | B>c d>c B<G (3(G/A/B/) | c>d e<c A2 d2 | 
 B>c d>c B<G (3(G/A/B/) | c>B A>G F<D (3(D/E/F/) | G>A B>G E<C C>E | D<G G>F G4 | d>c B>c d>c B>d | 
 c>d e<c d2 c2 | d>c B>c d>c B>d | c>d e<c d2 f2 | g>a b>a g>f e>d | c>d e<c d2 f2 | 
 g>f e>d c>B A>G | A>G F<A G4 :|  