Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:4/4
K:G
['D2 G2 B2 G2', 'GdcB GdcB']  
X:1
L:1/8
M:4/4
K:G
|: D2 G2 | B2 G2 | E2 A2 | c2 A2 | D2 G2 | B2 G2 | cBAG | FD G2 :: GdcB | GdcB | Aedc | Aedc | 
 GdcB | GdcB | cBAG | FD G2 :|  