Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:6/8
K:F
['c3 FAc faf g2 c efg cec', 'F3 cFF FGA cFG _EFC G_Ac Bcd']  
X:1
L:1/8
M:6/8
K:F
|: c3 FAc | faf g2 c | efg cec | BdB FGG | ABc FAG | Acf a2 g | fec AFC | CAG F3 :: cFF FGA | 
 cFG _EFC | G_Ac Bcd | _e2 _e gec | c3 ABc | GB_e g2 g | fec AFC | CAG F3 :|  