my particle emitter doesnt stop help?

this is a script that if you press c, you will sit and get some particles, but they dont stop, how do i fix it?

mouse.KeyDown:connect(function(key)~~~~~~~~~~~~~~~~~

if key == "e" then

player.Character.Humanoid.Sit=true

local Player = game.Players.LocalPlayer

local Particle = Instance.new("ParticleEmitter")

Particle.Parent = Player.Character.HumanoidRootPart --- Particle.Color = Color3.new(255, 255, 255) ---

Particle.LightEmission = 1 ---

Particle.LightInfluence = 1 ---

Particle.Size = 1 ---

Particle.Texture = "http://www.roblox.com/asset/?id=540295385"---

Particle.Transparency = 0 ---

Particle.ZOffset = 0

Particle.EmissionDirection = "Top"

Particle.Enabled = true

Particle.Lifetime = 0, 10 ---

Particle.Rate = 5 ---

Particle.Speed = 5 ---

wait (1)

Particle.Enabled = false

end end)

ALSO is there a way to make a sound play if this is used just to know?

First of all, "mouse" isn't defined. Maybe, just maybe, use classic Lua:

if app.Window:KeyDown("e") then
	local Player = game.Players.LocalPlayer
	local Particle = Instance.new("ParticleEmitter")
	Particle.Parent = Player.Character.HumanoidRootPart --- Particle.Color = Color3.new(255, 255, 255)
	Particle.LightEmission = 1 
	Particle.LightInfluence = 1 
	Particle.Size = 1 
	Particle.Texture = "http://www.roblox.com/asset/?id=540295385"
	Particle.Transparency = 0 
	Particle.ZOffset = 0
	Particle.EmissionDirection = "Top"
	Particle.Enabled = true
	Particle.Lifetime = 0, 10 
	Particle.Rate = 5
	Particle.Speed = 5 
	wait(1)
	Particle.Enabled = true
end

Warning: I'm not sure about this.