How do I make a GUI Giver?

1.step on brick 2.see if it's a character 3.find character 4.get player from character 5.check if player already has gui 6.if no then give gui.

local gui = script.Gui

function OnTouch(hit)
	local human = hit.Parent:findFirstChild("Humanoid")
	if human ~= nil then
		local char = human.Parent
		local player = game.Players:GetPlayerFromCharacter(char)
		if player ~= nil then
			local already = player.PlayerGui:findFirstChild(gui.Name) 
			if already == nil then -- makes sure that it doesn't two gui clones.
				local newgui = gui:clone()
				gui.Parent = player.PlayerGui
			end
		end
	end
end

script.Parent.Touched:connect(OnTouch)