Compose a piece of music that follows the specified structure and incorporates the given theme.
X:1
L:1/8
M:2/2
K:Emin
['', 'BcBA GBAG [G,E]2 [G,E]2 DEGA', 'B2 A2 A2'  
X:1
L:1/8
M:2/2
K:Emin
 (e2 |: e)fed BcBA | GBAG [G,E]2 [G,E]2 | DEGA BGAG | B e3 e2 ef | gfed BcBA | GBAG [G,E]2 [G,E]2 | 
 DEGA Bded |1 B2 A2 A2 e2 :|2 B2 A2 A2 AB |:[K:Amix] c2 AB c2 AB | cdef gfec | dcBc BAGA | 
 B2 d2 d2 ed | c2 AB c2 AB | cdef gage | dged BGA=c |1 B2 A2 A2 AB :|2 B2 A2 A2 Ad |: 
[K:G] d2 B2 BAGB | d2 B2 B2 BA | [G,G]2 b2 a2 g2 |1 e3 e e2 Ad :|2 e3 e e4 ||  