Compose a piece adhering to the given musical structure and theme.
X:1
L:1/8
M:4/4
K:Bmin
['d>e f2', 'b<b f>d'  
X:1
L:1/8
M:4/4
K:Bmin
|: vB<B d>e f2 (f>^g) | a>fe>d c<A A>c | B<B d>e f2 (f<b) | f>ed>c B2- Bf :: b<b f>d B>df>^g | 
 a<a e>c A>ce>a | b<b f>d B>df>b | f>ed>c B2- Bf :|  