Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:3/4
K:G
['GG d2 e/f/g ed/c/ c3']  
X:1
L:1/8
M:3/4
K:G
"A" | G GG |"G" d2 e/f/g ed/c/ |"Am" c3 B AB |"G" G3 A/B/"C" cB |"D" A3 G"^C/d" GG | 
"G" d2 e/f/g ed/c/ |"Am" c3 A"Em" B^c |"D" d3 e/d/"A" ^c/d/e/d/ |"D" d3 |]"B" |: d cB | 
"Am" c2 BA"G" BG |"C" c3 B AB |"G" G2"C" G/A/B"D" GF |"G" G3 :|  