How do I make a script in workspace work for only 1 player?

Hey there, I've recently tested my place and came across a problem: I've made a script that changes the outdoorambient and fogstart etc. for a cave. When I tested it with my friend both our outdoorambients got changed when only 1 person touched it, and the other was on the other side of the map.

I've tried using localscripts but then the script doesn't do anything, and I can't find anything on the wiki. Does anyone know how to solve this?

By the way here's the code I used to change the outdoorambient:

local lighting = game.Lighting
local Debounce = false
local Speed = 1

local function Tween(t,s,d,p,o)
    return game:GetService("TweenService"):Create(o,TweenInfo.new(t,Enum.EasingStyle[s],Enum.EasingDirection[d]),p)
end

script.Parent.Touched:Connect(function()
    if not Debounce then 
        Debounce = true
        Tween(Speed,"Sine","InOut",{Brightness = 1,FogStart = 0,FogColor = Color3.fromRGB(191, 191, 191),OutdoorAmbient = Color3.fromRGB(127, 127, 127)},lighting):Play()
Debounce = false
    end
end)

As this is a effect only it would need to be a local script so that the change is only local to that player. Secondly you would need to exclude other players as the event will run for anything that touched the part.

Local scripts do not run in the workspace so simple chaning the script to a local script will not work. I would place the script in StarterPlayerScripts then wait for the part in the workspace to be loaded in.

If you are planning of having multiple caves I would create a module to handle the setup as they will all share the same code but different cariables.

Lastly you are not waiting for the tween to complete making your debounce redundant. Use the event Completed

Example

-- please use get service in local script 
local plrServ = game:GetService("Players")
local lighting = game:GetService("Lighting")
local tweenServ = game:GetService("TweenService")

local localPlr = plrServ.LocalPlayer
local deb = false
local speed = 1
local tweenInfo = TweenInfo.new(speed, Enum.EasingStyle.Sine, Enum.EasingDirection.InOut) 

local part = [location to the part ie workspace:WaitForChild("Part")]

local function isLocalPlayer(hit)
	local plr = plrServ:GetPlayerFromCharacter(hit.Parent)
	return plr and plr == localPlr 
end

part.Touched:Connect(function(hit)
	if deb then return end -- deb check
	if not isLocalPlayer(hit) then return end -- only run for local player
	
	deb = true
	local tween = tweenServ:Create(lighting,tweenInfo, {Brightness = 1,FogStart = 0,FogColor = Color3.fromRGB(191, 191, 191),OutdoorAmbient = Color3.fromRGB(127, 127, 127)})

	tween:Play()
	tween.Completed:Wait() -- wait for tween to finish
	deb = false
end)

hope this helps.