Create a fitting sequence of chord changes that enhance the given musical piece.
|: F2 FF | FA cc | dB GF | EG CE | F2 FF | FA cc | dB GE | F4 :: 
 G2 AB | cA F2 | G2 AB | cA F2 | FA cf | ed cB | AG FE | F4 :|  
X:1
L:1/8
M:2/4
K:F
|:"F" F2 FF | FA cc |"Gm" dB GF |"C7" EG CE |"F" F2 FF | FA cc |"Bb" dB"C7" GE |"F" F4 :: 
"C7" G2 AB |"F" cA F2 |"C7" G2 AB |"F" cA F2 |"F" FA cf |"Bb" ed cB |"C7" AG FE |"F" F4 :|  