game:GetService("StarterGui"):SetCoreGuiEnabled(Enum.CoreGuiType.Health, false)

local character = game.Players.LocalPlayer.Character or game.Players.LocalPlayer.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")

local function update()
    script.Parent.TextLabel.Text = humanoid.Health.." / "..humanoid.MaxHealth
    script.Parent.Health:TweenSize(UDim2.new(humanoid.Health/humanoid.MaxHealth,0,1,0), "Out", "Linear", 0.25)
end

humanoid:GetPropertyChangedSignal("Health"):Connect(update)
humanoid:GetPropertyChangedSignal("MaxHealth"):Connect(update)