OnTouch player timer GUI?

When the player touches a brick a GUI timer pops up with 30 seconds.

When the timer runs out the player gets killed and the timer resets back to 30 seconds

I want the timer to pop up when the player actually touches the brick.

Can anyone make up a Lua script for this?

I use the Touched event of a brick to know when it is touched. Then I check to make sure the part that touched it is part of a character. And if they don't have the GUI I give it to them and start the countdown.

function NewGui()
	local Gui = Instance.new("ScreenGui")
	Gui.Name = "Countdown Gui"
	local Tect = Instance.new("TextLabel",Gui)
	Text.Name = "Countdown"
	Text.Size = UDim2.new(0.3,0,0.3,0) --Adjust size 
	Text.Position = UDim2.new(0,0,0,0) --Adjust position if wanted.
	return Gui
end
script.Parent.Touched:connect(function(Part)
	local Player = Game:GetService("Players"):GetPlayerFromCharacter(Part.Parent)
	if Player and not Player.PlayerGui:FindFirstChild("Countdown Gui") then
		local Gui = NewGui()
		Gui.Parent = Player.PlayerGui
		for i=30,0,-1 do
			Gui.Countdown.Text = i
			wait(1)
		end
		Player.Character:BreakJoints()
	end
end)