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:F
['F2 BFAF CFAc fefg af f2 cfAc', 'af f2']  
X:1
L:1/8
M:4/4
K:F
|: FE | CF F2 BFAF | CFAc fefg | af f2 cfAc | BAGF EF (3DFDCF F2 BFAF | CFAc fefg | af f2 cfAc | 
 BGEG F2 :: fg | af f2 gfde | fd{e}d^c d=c (3ABc | dA{B} A2 d2 fe | dcBA GF (3DEF | CF F2 BFAF | 
 CFAc fefg | af f2 cfAc | BGEG F2 :|  