Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
M:3/8
K:G
['BBB B2 d dcc B2']  
X:1
L:1/8
M:3/8
K:G
 BBB | B2 d | dcc | B2 z | BBB | dcc | Acc | cBB | BBB | B2 d | dcc | B2 z |]  