Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/16
M:2/4
K:G
['G2Bd cAFD GBdg d2cB ceAc BdGB', 'G2[GG,]2 d2Bc d2Bc dgfe e2d2 g2ge fafd']  
X:1
L:1/16
M:2/4
K:G
 G2Bd cAFD | GBdg d2cB | ceAc BdGB | AcAF G2[GG,]2 :: d2Bc d2Bc | dgfe e2d2 | g2ge fafd | 
 ege^c d2D2 | G2Bd cAFD | (GBdg) d2cB | ceAc BdGB | AcFA G2[GG,]2 :|  