I need to make a group object disappear then reappear Help scripting?

I am trying to make a model/ grouped object disappear when touched then reappear after 5 seconds, if anyone knows how to do this please send me the code

This isn't a request site but i'll give you the code. If you want It do it on the model then change lines 7 - 9 to workspace.Model.Part.Transparency

while true do
	wait()
	script.Parent.Touched:Connect(function(hit)
		if hit.Parent:FindFirstChild("Humanoid") then
			workspace.Part.Transparency = 1
			wait(3) -- Change this to the time that you want
			workspace.Part.Transparency = 0
		end
	end)
end