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:2/4
K:F
['F2 Ac']  
X:1
L:1/8
M:2/4
K:F
 c | c3 A | F2 Ac | BABG | E2 DC | F2 C2 | F2 GA | G4- | G2 AB | cd cA | F2 Ac | BA BG | E2 CC | 
 F2 AF | GA BA | (F4 | F2) x2 |]  