I'm having trouble with Instance.new. Why is this code not creating the Int Value?

I'm trying to make a health bar while not using the player's actual health. I'm trying to use an Integer Value to replace the player's health. This is my code but it seems that the Instance.new isn't working.

wait(1)

--Variables
local player = game.Players.LocalPlayer
local character = player.Character
local humanoid = character.Humanoid
local hpBar = script.Parent.Bar

  

--Functions
game.Players.PlayerAdded:Connect(function()
    local health = Instance.new("IntValue")
    health.Name = "Health"
    health.Parent = player
    health.Value = 100
end)

function Update()
    local hp = player.Health.Value / 100 - 0.02
    if hp > 2 then
	    hpBar:TweenSize(UDim2.new(hp, 0, 0.85, 0))
    else
	    humanoid.Health = 0
    end
end

Update()

player.Health.Changed:Connect(Update)

I have some possible conclusions:

• Is this a local script? If it is you should put it in playerStarterScripts or something like that.

• You shouldn't set the Instance.New() to local, it needs to be global

• Check if the script even runs with debug print("test")