Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:6/8
K:G
['B B']  
X:1
L:1/8
M:6/8
K:G
 DG | B B B B A G | A G G G3 | G B d (dB) G | D2 A A3 | G2 d d3 | c2 e e3 | d e d (dc) B | 
 (BG) G G2 ||  