Window changer by xdotool in linux by bash scripts. Here automate the `alt + tab` command.

window_changer.sh

#!/bin/bash

while true; do
  xdotool keydown alt key Tab; sleep 2; xdotool keyup alt
  sleep 30;
done

# First need to make executable by Run this command.
# chmod +x file_name.sh
# And then run like this from folder -> ./file_name.sh