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
M:6/8
K:Dmix
['GDG ABB d2 e dBd c2', 'c2 A']  
X:1
L:1/8
M:6/8
K:Dmix
|: GDG ABB | d2 e dBd | c2 B cAA | F2 A FED | GDG ABB | d2 e dBd | c2 A D3 | AGG G3 :: d3 dBd | 
 g3 dB/c/d | c2 B cAA | f3 fed | d3 dB/c/d | g3 dBG | c2 A FED | AGG G2 B | d3 dB/c/d | g3 dB/c/d | 
 c2 A B2 G | A3 FED | G3 BAG | dB/c/d g2 d | c2 A D3 | AGG G3 ||  