Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/4
M:3/4
K:C
['E D', 'G E C']  
X:1
L:1/4
M:3/4
K:C
 C | E D C | G F E | c c A/B/ | c3 | G E C | C B, C | E D D | D2 G | G G E/F/ | G G c | c c A/B/ | 
 c2 A | G E C | D E D | C3- | C3 || | G3 | c3 | G E C | C B, C | D2 G | G2 E/F/ | G2 c | c2 A/B/ | 
 c2 A | G E C | D E D | C3- | C3 ||  