Why isn't Tick() working properly..

[potent blaze]

    elseif Event == "Lighting" then
        
        local oldTick = tick()
        
        local ArgTable = (...)
        local Value = ArgTable["Value"]
        
        local lighting = game:GetService("Lighting")
        local ts = game:GetService("TweenService")
        
        local Duration = 2
        
        if not lighting:FindFirstChild("MalevolentShrineLighting") and Value == true then
            
            local Slashing = Instance.new("ColorCorrectionEffect",game.Lighting)
            Slashing.Name = "MalevolentShrineLighting"

            local Goal = {
                Brightness = -0.3,
                Contrast = 0.2,
                TintColor = Color3.fromRGB(255, 181, 181)
            }
            local Info = TweenInfo.new(1,Enum.EasingStyle.Sine)
            local Tween = ts:Create(Slashing,Info,Goal)
            Tween:Play()
            
            spawn(function()
                while true do
                    task.wait()
                    if tick() - oldTick >= Duration then
                        print("It passed 2 seconds.")
                    end
                end
            end)
            
        end
        
    end```
The tick isn't reseting back to 0 every time the event is fired, instead it just keeps going up...

afwahfa

[misty sparrow]

I’m sssing a problem here

[potent blaze]

ok

does sss mean screenshotting?

[misty sparrow]

Sensing

[potent blaze]

oh

ok well

what is the problem