Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:2/2
K:G
['eA A2', 'a bg aged']  
X:1
L:1/8
M:2/2
K:G
"Am" eA A2 gAfA | eA A2 eAdA | eA A2 eAfA |"G" gedB GABd :|"Am" ea a2"G" baag |"Am" eaag"Em" egdg | 
"Am" ea a2"G" bgag |"Em" edef"G" gedg |"Am" ea a2"G" baag |"Am" eaaf"G" g3 a | bg g2"Am" aged | 
 eaag"G" edBd |]  