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:2/2
K:Ddor
['D2 (3EFG', 'D2 dcAG', 'B cAGF ECCE DEFG Addc (3ABc Gc', 'Acde f3 d']  
X:1
L:1/8
M:2/2
K:Ddor
 dcAG ADDB | cAGF ECCE | D2 (3EFG Addc | AcGc Aefe | dcAG FGAB | c2 Bd cAGE | D2 (3EFG AddB | 
 cAGE FD D2 :: dcAG Acde | f3 d ecAB | cAGE GAcd | ec c2 eage | dcAG Acde | fedf ecAG | F3 G AddB | 
 cAGE FD D2 ::"^\"Variations:\"" dcAG A3 B | cAGF ECCE | DEFG Addc | (3ABc Gc Aefe | dcAG FGAB | 
 c2 Bd cAGE | DEFG AddB | A2 GE FD D2 :: dcAG Acde | f3 d ecAB | cAGE GAcd | ec c2 eage | 
 dcAG Acde | f3 d ecAG | FEFG AddB | A2 GE FD D2 :|  