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:4/4
K:C
['BAGF (3(D=E^F) GA', 'dgga (3(bag)']  
X:1
L:1/8
M:4/4
K:C
[M:2/2][K:Gmin] .abc BAGF DGGB | AFcF dFcF | BAGF (3(D=E^F) GA | BABc dgga | (3(bag) a^f gdd=e | 
 fdcB AF F2 | BAGF (3(D=E^F) GA | (Bd)cA (BG) G2 || Ggg^f gag=f | Fff=e fgaf | Ggg^f dgga | 
 (3(bag) af dgga | (3(bag) (3(agf) gdd=e | fdcB AF F2 | BAGF (3(D=E^F) GA | (Bd)cA BG G2 |]  