Script for counting cards in scripting zone?

[BlaCk NinJa]

Trying to make a script for a card game. Anyone able to help me make a script, that reveals a number based on the number of cards in a scripting zone?
Example: Let´s say I have 3 cards spread out within a scripting zone. I then want the zone to display a custom text saying: "x3 cards in the zone".

I found this mod in the workshop:
https://steamcommunity.com/sharedfiles/filedetails/?id=772912200
- but the problem with this mod, is that it only counts all the individual objects separately, instead of adding them up together. Every card in my script will have a value of [1]. Preferably, I would like the zone to recognise objects within based on the 'Card' item.tag.

Any help is much appreciated, I´m quite new to programming and LUA in general.
Thanks!

[Finaryman]

put this in GLOBAL scripts.
remember to edit GUID there.

function onLoad()
  zone=getObjectFromGUID("YOUR ZONE GUID HERE")
end

function refreshcount()
  local count=0
  for i, lobj in ipairs(zone.getObjects()) do
    if lobj.type == "Card" then
      count=count+1
    elseif lobj.type == "Deck" then
      count=count + #lobj.getObjects()
    end
  end
  printToAll("Zone has " .. count .. " cards in it.")
end

function onObjectEnterZone(curzone,obj)
  if zone == curzone then
    refreshcount()
  end
end

function onObjectLeaveZone(curzone,obj)
  if zone == curzone then
    refreshcount()
  end
end

[BlaCk NinJa]

Thank you so much, this works like a charm! I had been
struggling with this for so long, this is much appreciated!

[Finaryman]

don't forget that with strugling you learn.