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:1/4=200
M:6/4
K:Amin
['AGAB c2 Bc', 'e2 Ae eA', 'AEAB c2 Bc', 'e2 Ae-eA']  
X:1
L:1/8
Q:1/4=200
M:6/4
K:Amin
 AGAB c2 Bc dcAE | AGAB c2 Bc dc A2 :: e2 Ae eA cABd (3cBA | e2 Ae eA cABc A2 :: 
"^variations" AEAB c2 Bc dcAG | AEAB c2 Bc dc A2 :: e2 Ae-eA cABd cA |1 e2 Ae-eA cABc AA :|2 
 e2 Ae-eA cABc AE ||  