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
['G2 BG DGBd g3 e fdcA', '(3Bcd cA']  
X:1
L:1/8
M:4/4
K:G
 G2 BG DGBd | g3 e fdcA | B3 d cA A2 | f2 fe fdcA | G2 BG DGBd | g3 e fdcA | B2 Bd cA (3AAA |1 
 AG (3FGA GDEF :|2 AG (3FGA G3 a || bg (3ggg dg (3ggg | bg ga f3 g | af (3fff cf (3fff | 
 g2 ge fdcA | G2 BG DGBd | g3 e fdcA | (3Bcd cA (3Bcd cA |1 AG (3FGA G3 a :|2 AG (3FGA G4 ||  