Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:9/8
K:Emin
['B2 E', 'G2 B B^AB', 'G2 B BAB', 'ABc dAG']  
X:1
L:1/8
M:9/8
K:Emin
|: B2 E E^DE c2 A | B2 E E2 G F2 D |: G2 B B^AB BAB | G2 B B^AB =AFD | G2 B B^AB BAB |1 
 AB^c dAG FED :|2 ABc d2 G FF/G/A |: B2 E EDE c2 A | BEE E2 G FED |: G2 B BAB B2 B | 
 G2 B BAB A2 D | GBB BAA BAB |1 ABc dAG F2 D :|2 ABc dAG FGA ||  