Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
Q:1/4=120
M:2/2
K:Emin
['B G2 GE GDDE GAGE D2 DG', 'GEE e dGBG dGGA GAGE D2 DG']  
X:1
L:1/8
Q:1/4=120
M:2/2
K:Emin
 B | G2 GE GDDE | GAGE D2 DG | EAAG ABde | dBcA GEE :: e | dGBG dGGA | GAGE D2 DG | eAcA eAAB | 
 cBAG E2 Ee | dGBG dGAB | GAEG DEGD | EAAG ABde | dBcA GEE :|  