Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/16
M:2/4
K:D
['B2G2 G2(AB)', 'B2d2 d2g2']  
X:1
L:1/16
M:2/4
K:D
 dc | B2G2 G2AB | c2A2 A2(dc) | B2G2 G2(AB) | dcBG ABcA | B2G2 G2(AB) | c2A2 A2dc | B2G2 d2(cA) | 
 A2G2 G2 :: dc | B2d2d2g2 | AGAB c2BA | B2d2 d2g2 | edef gfed | B2d2 d2g2 | AGAB c2dc | B2GB A2FA | 
 G2G2G2 :|  