Custom Health Bar

local players = game:GetService("Players");
local runService = game:GetService("RunService");

local localPlayer = players.LocalPlayer;

local screenGui = script.Parent;
local healthBar = screenGui.Health;
local bar = healthBar.Bar;
local amount = healthBar.Amount;

runService.RenderStepped:Connect(function()
    local character = localPlayer.Character;
    local humanoid = character and character.Humanoid;

    if character and humanoid then
        local health = humanoid.Health;
        local maxHealth = humanoid.MaxHealth;

        local xScale = (health / maxHealth);

        bar:TweenSize(UDim2.new(xScale, 0, 1, 0), "Out", "Sine", 0.1, true);
        amount.Text = math.floor(health + 0.5);
    end
end);