How do I make my fireball disappear after 4 seconds of travel?

Hello! I tried looking if a question like this was already asked. but I did not find anything so if it already asked, im sorry. Anyways, I want to make it so that when my fireball has been launched after pressing the e key, it will disappear after 4 seconds instead of still existing.

Here is my code:

local Player = game.Players.LocalPlayer
local char = Player.Character or Player.CharacterAdded:Wait()
local head = char:WaitForChild("Head")

local x = Instance.new("Part")
	x.BrickColor = BrickColor.new("Maroon")
	x.Shape = "Ball"
	x.CanCollide = true
	x.Transparency = 0.5
	x.TopSurface = "Smooth"
	x.BottomSurface = "Smooth"
	x.Size = Vector3.new(3,3,3);

local y = Instance.new("Fire")
	y.Size = 15
	y.Heat = 5

game:GetService("UserInputService").InputBegan:connect(function(input)
    if input.KeyCode == Enum.KeyCode.E then
        local cl = x:Clone()  
		local cly = y:Clone()
		local v = Instance.new("BodyVelocity")
				v.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
				v.Velocity = Player.Character.UpperTorso.CFrame.lookVector * 60
				v.Parent = cl
				cly.Parent = cl
        		cl.Parent = game.Workspace -- You forgot to Parent it
       			cl.Position = head.Position + (head.CFrame.lookVector * 2) 
       										 -- Position of head + push it in the direction the 
       										 -- player is looking and * 2 away from the player
    end
end)

Also, I am sorry if my code is really bad, I just started scripting 4 days ago! :D