Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:2/4
K:C
['C D E F G2 G2 |]:', 'A G4 F F', 'G G']  
X:1
L:1/8
M:2/4
K:C
 C D E F | G2 G2 |]: A A A A | G4 :| F F F F | E2 E2 | G G G G | C4 |]  