Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/4
M:4/4
K:G
['G/B/ d', 'g g']  
X:1
L:1/4
M:4/4
K:G
 G/B/ d G/B/ d | e e d2 | c c B B | A/G/A/B/ A2 | G/B/ d G/B/ d | e e d2 | c c B B | A/G/A/B/ G2 :| 
 g g g f/e/ | d3/2 e/ d/c/ B | A A e d | B/A/B/c/ e d | g g g f/e/ | d3/2 e/ d/c/ B | A A e d | 
 G G G2 :|  