Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:4/4
K:G
['D>B,G,>B, G>DB,>D', 'd>BG>B d>ed<B']  
X:1
L:1/8
M:4/4
K:G
 E | D>B,G,>B, G>DB,>D | E<A,E>D E<A,A,>E | D>B,G,>B, G>DB,>D | C<ED>B, G,/G,/G, G,>E | 
 D>B,G,>B, G>DB,>D | E<A,E>D E<A,A,>c | B<GA>F G>ED>B, | C<ED>B, G,/G,/G, G,>B || d>BG>B d>ed<B | 
 d>BG>B A<A,A,>B | d>BG>B d>ed<B | c>ed<B G/G/G G>B | d>BG>B d>ed<B | g>ba<g a2 a>g | 
 b<ga<f g>ed<B | c>ed<B G/G/G G ||  