Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
Q:1/4=90
M:4/4
K:G
['(Bd) (ef)ed B2 (AB) d2 d2 E2', 'G2 GA B3 d g2 (fg) (ag)fg', 'd2 (Bd) (ef)ed B2 (AB) d2 d2']  
X:1
L:1/8
Q:1/4=90
M:4/4
K:G
"_vb" (Bd) | (ef)ed B2 (AB) | d2 d2 E2 (GA) | B2 dB (Ac)BA | G4- G2 || GA | B3 d g2 (fg) | 
 (ag)fg e2 dc | Bdef g3 f | e4 d2 || (Bd) | (ef)ed B2 (AB) | d2 d2 E2 (GA) | B2 dB (Ac)BA | 
 G4- G2 |]  