Tab

Player = game.Players.LocalPlayer
Mouse = Player:GetMouse()
gui = script.Parent
box = gui.Box
Open = false
local inputHandler = game:GetService("UserInputService")


inputHandler.InputBegan:connect(function(inp)
	local itype = inp.UserInputType
	local key = inp.KeyCode

	if itype == Enum.UserInputType.Keyboard then
		if key  == Enum.KeyCode.Tab then
			if (Open == false) then
				Box.Visible = true
				Open = true
			elseif (Open == true) then
				Box.Visible = false
				Open = false
			end
		end
	end
end)