So I am trying to program a robot but it has 2 motors on each side making it confusing since I'm trying to make the robot move forward backward left and rigth or in other words I'm trying to make it as an arcade driver . Sorry for my terrible English I did this in a hurry

So does your robot have a holonomic drive with omni or mecanum wheels? If it does not, you can never move left or right without turning. If you meant turn left or right instead of move, then that is what is usually called arcade drive like you mentioned. I believe that you already asked a similar question here: viewtopic.php?f=11&t=3901&p=16601
That post already gave you a couple examples on how to code arcade drive for two wheels. If you want to now code it for four wheels in a standard tank configuration, just use the same equation for both wheels on the same side