[Help!] How do i make custom scripts?

I want to make a custom script for my server that shows how many people are in an area. I want to do this for PvP events that i will have. Any idea? I want it kinda like the thing in the top of the screen in WSG but with the ammount of people there on horde and alliance

Not Possible.

no it is possible you just have to code it in the c++ and im not sure how to do it myself so...please don't ask me i would just change everything to a arena in the code to do it
but it wouldn't be as nice as wsg
(blizzcraft lmao)