Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
Q:1/8=160
M:6/8
K:Emin
['g dBB BAB', 'gfg aga bge']  
X:1
L:1/8
Q:1/8=160
M:6/8
K:Emin
 g | dBB BAB | dBB B2 g | dBB BAB | GEE E2 g | dBB BAB | dBA BAG | A2 A BAB | GEE E2 :| d | 
 gfg aga | bge dBG | gfg aga | bge e2 g/a/ | bag agf | gfe dBG | A2 A BAB | GEE E2 :|  