How do I make text appear on the screen when a part is clicked?

So far, when I click the part (the 'door') the screen flashes as I ask it to. However, I want the text to appear afterwards for two seconds. Anybody know what mistakes I have made here? Answers would be greatly appreciated.

-- VARIABLES --
colcor = game.Lighting.ColorCorrection
local can = script.Parent.Parent.can
can = true
local replicatedstorage = game.ReplicatedStorage
local text = replicatedstorage.TextLabel
local textclone = text:Clone()		

-- USER CLICKS ON DOOR --
script.Parent.MouseClick:connect(function()
	
	if can == true then
			
			can = false 
		
	        colcor.Brightness = -0.6
			wait(.4)
			colcor.Brightness = 0.6
			wait(.4)
			colcor.Brightness = -0.6
			wait(.4)
		    colcor.Brightness = 0.6
	        wait(.4)
		    colcor.Brightness = -0.2
		    wait(.4)
		    textclone.Parent = game.StarterGui["DOOR PROMPT"]
		    textclone.Visible = true
		    wait(2)
		    textclone:Destroy()
		    can = true
		
	end

end)

You are not supposed to clone it to the StarterGui, but actually the PlayerGui. The PlayerGui is located in game.Players.PLAYERNAME.PlayerGui

• Switch PLAYERNAME to the player's name. As you are on a server script, you would have to get the localplayer, and then simply clone it to their PlayerGui.

So. After talking via the community chat, I know how to solve the issues. Here's how you solve it. GUIs are LocalScripts because (if using StarterGui) they immediately replicated to the LocalPlayer.PlayerGui. A way to solve that is to use Remote Events. There is nothing wrong here apart from some inefficient methods. Also do not use a value, use a variable.

Server Script

colcor = game.Lighting.ColorCorrection
local debounce = false --Put a better name rather than 'can'.
can = true
local remoteEvent = game.ReplicatedStorage.RemoteEvent 

script.Parent.MouseClick:Connect(function(click)
	if debounce then --Alternative: if debounce == true
	    debounce = true
            colcor.Brightness = -0.6
            wait(.4)
            colcor.Brightness = 0.6
            wait(.4)
            colcor.Brightness = -0.6
            wait(.4)
            colcor.Brightness = 0.6
            wait(.4)
            colcor.Brightness = -0.2
            wait(.4)
	    remoteEvent:FireClient(game.Players:GetPlayerFromCharacter(click))
	    debounce = false
    end
end)

Local Script

game.ReplicatedStorage.RemoteEvent.OnClientEvent:Connect(function()
	local plrGui = game.Players.LocalPlayer.PlayerGui
	plrGui["DOOR PROMPT"].TextLabel.Visible = true
end)

(Minor Nitpicks: Do not use connect as it is deprecated. Use Connect instead.)