how do I make when I touch a wall or a brick then a image pops up in your face?

this is what I have right know

script.Parent.Touched:Connect(function(hit)
	local humanoid = hit.Parent:FindFirstChild("Humanoid")
	if hit.Parent ~= humanoid then
             -- I Don't know what to put here but I know I'll have to connect this script to the screen GUI
	end
end)