Cloning from lighting and setting parent?

clicked = 0
script.Parent.MouseButton1Click:connect(function()
    player = script.Parent.Parent.Parent.Parent.Parent
    if clicked == 0 then
        if not player:FindFirstChild("Car") then
            car = Instance.new("Model", Workspace)
            car.Parent = player
            car.Name = "Car"
        end
        script.Parent.BorderSizePixel = 2
        script.Parent.BorderColor3 = Color3.new(255, 0, 0)
        local addon = game.Lighting.cartestpart1:Clone() --change
        addon.Parent = player.Car
        addon.Position = Vector3.new(68.1, 5.79, 16.1)
        clicked = 1
    elseif clicked == 1 then
        script.Parent.BorderSizePixel = 0
        script.Parent.BorderColor3 = Color3.new(53, 53, 53)
        clicked = 0
    end
end)

I'm trying to make a button that adds an object/model to a truck. I can't get it to work. And I'm stuck

OUTPUT: 'Players.Player1.PlayerGui.CarShop.BackGround.ClickTest.Scri', Line 12 17:48:23.445 - Stack End 17:48:23.447 - Disconnected event because of exception