---

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")

local player = Players.LocalPlayer
local camera = workspace.CurrentCamera

local gui = Instance.new("ScreenGui")
gui.Name = "CrosshairGui"
gui.ResetOnSpawn = false
gui.IgnoreGuiInset = true
gui.Parent = player:WaitForChild("PlayerGui")

local dot = Instance.new("Frame")
dot.Name = "CenterDot"
dot.Size = UDim2.fromOffset(4, 4)
dot.Position = UDim2.fromScale(0.5, 0.5)
dot.AnchorPoint = Vector2.new(0.5, 0.5)

dot.BackgroundColor3 = Color3.new(1, 1, 1)
dot.BorderSizePixel = 0
dot.Parent = gui

local corner = Instance.new("UICorner")
corner.CornerRadius = UDim.new(1, 0)
corner.Parent = dot

local rayParams = RaycastParams.new()
rayParams.FilterType = Enum.RaycastFilterType.Exclude

local function isWhite(color)
	return color.R > 0.9
		and color.G > 0.9
		and color.B > 0.9
end

RunService.RenderStepped:Connect(function()

	camera = workspace.CurrentCamera

	local character = player.Character

	rayParams.FilterDescendantsInstances =
		character and {character} or {}

	local viewport = camera.ViewportSize

	local ray =
		camera:ViewportPointToRay(
			viewport.X / 2,
			viewport.Y / 2
		)

	local result =
		workspace:Raycast(
			ray.Origin,
			ray.Direction * 1000,
			rayParams
		)

	if result
		and result.Instance:IsA("BasePart")
		and isWhite(result.Instance.Color) then

		dot.BackgroundColor3 =
			Color3.new(0, 0, 0)

	else

		dot.BackgroundColor3 =
			Color3.new(1, 1, 1)

	end
end)