Simple coordinate

local ScreenGui = Instance.new("ScreenGui")
local Frame = Instance.new("Frame")
local TextLabel = Instance.new("TextLabel")

ScreenGui.Parent = game.Players.LocalPlayer:WaitForChild("PlayerGui")
Frame.Parent = ScreenGui
Frame.BackgroundColor3 = Color3.fromRGB(40, 40, 40)
Frame.Size = UDim2.new(0, 200, 0, 50)
Frame.Position = UDim2.new(0.5, -100, 0, 20)

TextLabel.Parent = Frame
TextLabel.Size = UDim2.new(1, 0, 1, 0)
TextLabel.BackgroundTransparency = 1
TextLabel.TextColor3 = Color3.fromRGB(255, 255, 255)
TextLabel.Font = Enum.Font.SourceSans
TextLabel.TextSize = 20

game:GetService("RunService").RenderStepped:Connect(function()
    local player = game.Players.LocalPlayer
    local char = player.Character or player.CharacterAdded:Wait()
    local hrp = char:WaitForChild("HumanoidRootPart")
    local pos = hrp.Position
    TextLabel.Text = "X: " .. math.floor(pos.X) .. " | Y: " .. math.floor(pos.Y) .. " | Z: " .. math.floor(pos.Z)
end)