Checkpoint Effects (like confetti or something) particle emmiter?

so i am making this obby and i have created this checkpoints but i want the checkpoints to have like a effect when you're tuching it ( like a particle emmiter (confetti) ) but i only want it to happend once per player. Can Somebody help me with both?

-L30N_C

First, I set a variable called touch to see if the player has already touched the part

local touch = false

Next i used .Touched to see if the player touched the Part.

script.Parent.Touched:Connect(function()

Then after that, i saw if touch equaled false

if touch == false then

I created a new instance "ParticleEmitter" and put a wait(3) then destroyed it and also put touch to be equal to true

local conf = Instance.new("ParticleEmitter")
		conf.Parent = script.Parent
		touch = true 
		wait(3)
		script.Parent:FindFirstChild("ParticleEmitter"):Destroy()

So, it should end up like this

local touch = false
script.Parent.Touched:Connect(function()
	if touch == false 
	then 
		local conf = Instance.new("ParticleEmitter")
		conf.Parent = script.Parent
		touch = true 
		wait(3)
		script.Parent:FindFirstChild("ParticleEmitter"):Destroy()
	end
end)