Compose music that follows the specified structure and includes the provided theme
X:1
L:1/8
M:4/4
K:Bmin
['a2 a>b']  
X:1
L:1/8
M:4/4
K:Bmin
 Bc | d2 B>B B2 AB | ed B2 A2 de | f2 e>f edB>B | B6 ef | g2 ag f2 gf | edef a2 a>b | 
 afe>f ed B>B | B6 fg | a2 a>b a2 a>b | afef a2 fa | b2 b>b bafa | b2 b2 a2 ba | g2 ag f2 gf | 
 edef a2 a>b | afe>f edB>B | B6 |]  