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
['G/B/ dddB>AB cccA>GA BBc d2 d/c/ BBA']  
X:1
L:1/8
M:6/8
K:G
 D | G>FGA>GA | BG z3 G/A/ | B>ABc>Bc | d>ed/c/ B2 G/B/ | dddB>AB | cccA>GA | BBc d2 d/c/ | 
 BBA G2 G/B/ | dddB>AB | cccA>GA | BBc d2 d/c/ | BBA G2 |]  