Running multiple scripts at once

Is it possible to run a script that is doing some action on the left half of the screen, and another on the right half doing other actions at the same time. The idea is to have two different scripts targeting the same SUT and working at the same time

What you’re asking for is the same as having two people working on a single computer at the same time. But a computer has only one pointer/mouse and only one keyboard, so no, it is not possible.