mac – How can I mirror my mouse and keyboard throughout a number of shows?

I wish to duplicate actions carried out on my fundamental display screen on a second display screen i.e. mouse clicks and keyboard enter.

I’ve one iMac, with two comparable shows. On each shows, I’ve opened two similar applications with close to pixel-perfect similar positions on the screens.

How can I obtain this? Does such a job require a programmer?

For example:

To illustrate, I open the Chrome browser, logged-in with my Google username ,on the primary display screen. On the display screen show connected to my Mac, I open one other Chrome browser window, this time logged-in as my good friend’s Google username.

What I need is for something I do on the primary browser (mouse clicks and keyboard) to be performed on the second browser, on the second monitor.