Help me to invert voltage

Hello, it is my first post.

I want to modify simple voltage divider to have 2 simultanous outputs:
a) output 0 to 5v
b) output 5 to 0v
example : if the output a is 1v then output b is 4v, if output a is 2.5v , output b is 2.5v

Code:

---

  5v----
        I
        >  pot 10k
        <----------> output  a (0 to 5v)
        >      I
        I      I
  gnd---        -------- ?????? -------> output b (5 to 0v)

---

can opamp be used as inverted voltage follower ?

thank you

Yes, you can use an opamp for this. The best is to use an opamp which has a rail to rail output . Than the output voltage goes to 0 and to max V
I post the schema here hoe to make it.

Thank you for your help, Mat
Have a nice day !