please
stage 1) i want to go to the next screen in the browser
stage 2)and than move the Mose to top of the screen
stage 3)and than go back to the previous screen that in stage 1
stage 4)and than the Mose need to go to is initiate Mose coordinate location in stage 1
If you mean screen as in spaces / separate desktops, unfortunately, Apple have not made the API for controlling Spaces public, so there is no public API for Keyboard Maestro to use in controlling it.
You may be able to simulate keystrokes to move between Spaces.