Produce a music piece that aligns with the mentioned musical structure and theme.
X:1
L:1/8
Q:3/8=108
M:6/8
K:Bb
['B2 B B2', '[BB,]DF [BB,]DF [BB,]EG [BB,]EG'  
X:1
L:1/8
Q:3/8=108
M:6/8
K:Bb
|: B2 B B2 b | B2 B B2 F | GAB cdB | A2 F F2 A | B2 B B2 b | B2 B B2 F | GAB FGE | D3 [BB,]3 :: 
 [BB,]DF [BB,]DF | [BB,]EG [BB,]EG | E2 e c2 B | A3 F3 | [BB,]DF [BB,]DF | [BB,]EG [BB,]EG | 
 [cC]2 e c2 A | B3 [B,B]3 :|  