Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/2=90
M:4/4
K:Cdor
['BFdB fdbg ecAc BAGF GEDE', 'B4 DB,FD BFdB egec BAGF GBeG AfBg']  
X:1
L:1/8
Q:1/2=90
M:4/4
K:Cdor
 BFdB fdbg | ecAc BAGF | GEDE CEGc | efgB (B2 A2) | BFdB fdbg | ecAc BAGF | GEDE CD B,2 | 
 ecBA B4 :: DB,FD BFdB | egec BAGF | GBeG AfBg | agfe f4 | gede fdBF | (3GAB (3cde BAGF | 
 GEDE CD B,2 | ecBA B4 :|  