Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
Q:1/2=80
M:2/2
K:G
['G2 Gd Bd GB A2', 'B2 Bc']  
X:1
L:1/8
Q:1/2=80
M:2/2
K:G
 G2 Gd Bd GB | A2 D2 G/A/B/A/ GD | G2 Gd Bd GB | A2 D2 G4 || B2 Bc dBGg | e2 ce dBAG | B2 Bc dBAg | 
 e2 Be d4 |]  