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 (3Bcd GdBd GdBd cAAd', 'GABd gfag fd d2']  
X:1
L:1/8
M:4/4
K:G
 G2 (3Bcd GdBd | GdBd cAAd | D2 FA dAFA | d2 fd cAFA | G2 (3Bcd GdBd | GdBd cAAd | DEFG AB (3cBA | 
 dcAF G3 F :| GABd gfag | fd d2 af d2 | DE=FA c3 d | ed d2 cAFA | GABd gfag | fd d2 afde | 
 =f3 e fedc | AGFA G3 F :|  