Health bar copy in scriptblox website only to work

local Players = game:GetService("Players")

local function createHealthBar(player)
    local character = player.Character
    if not character then return end

    local humanoid = character:FindFirstChild("Humanoid")
    local head = character:FindFirstChild("Head")
    if not humanoid or not head then return end

    -- Remove old health bar if exists
    local oldGui = head:FindFirstChild("HealthBarGui")
    if oldGui then oldGui:Destroy() end

    local billboardGui = Instance.new("BillboardGui")
    billboardGui.Name = "HealthBarGui"
    billboardGui.Adornee = head
    billboardGui.Size = UDim2.new(4, 0, 1, 0)
    billboardGui.StudsOffset = Vector3.new(0, 2.5, 0)
    billboardGui.AlwaysOnTop = true
    billboardGui.Parent = head

    local background = Instance.new("Frame")
    background.Size = UDim2.new(1, 0, 0.3, 0)
    background.BackgroundColor3 = Color3.fromRGB(50, 50, 50)
    background.BorderSizePixel = 1
    background.Parent = billboardGui

    local healthBar = Instance.new("Frame")
    healthBar.Size = UDim2.new(1, 0, 1, 0)
    healthBar.BackgroundColor3 = Color3.fromRGB(255, 0, 0)
    healthBar.BorderSizePixel = 0
    healthBar.Parent = background

    local healthText = Instance.new("TextLabel")
    healthText.Size = UDim2.new(1, 0, 1, 0)
    healthText.BackgroundTransparency = 1
    healthText.TextColor3 = Color3.fromRGB(255, 255, 255)
    healthText.TextStrokeTransparency = 0.7
    healthText.Font = Enum.Font.SourceSansBold
    healthText.TextSize = 14
    healthText.Parent = background

    local function updateHealth()
        local health = humanoid.Health
        local maxHealth = humanoid.MaxHealth
        local healthPercent = math.clamp(health / maxHealth, 0, 1)

        healthBar.Size = UDim2.new(healthPercent, 0, 1, 0)
        healthText.Text = string.format("%d / %d", math.floor(health), math.floor(maxHealth))
    end

    humanoid.HealthChanged:Connect(updateHealth)
    updateHealth()
end

local function onCharacterAdded(character)
    local player = Players:GetPlayerFromCharacter(character)
    if player then
        createHealthBar(player)
    end
end

for _, player in pairs(Players:GetPlayers()) do
    if player.Character then
        createHealthBar(player)
    end
    player.CharacterAdded:Connect(onCharacterAdded)
end

Players.PlayerAdded:Connect(function(player)
    player.CharacterAdded:Connect(onCharacterAdded)
end)