synchronize two screens

Let's say I have two screens open in the calendar:

1.1 - First screen is opened on the doctor's computer.

1.2 - Second screen is opened on the secretary's computer.

When the registry modifies something on the calendar screen, for example, it changes the patient status from "confirmed" to "Waiting room".

Automatically the physician's screen should be updated.

3.1 It should be updated without the doctor giving "f5" on the page.

3.2 This update should be automatic.

3.3 And you should update only the patient status on the doctor's scheduling screen, not the entire screen.