Snow Script ?

I'm trying to do one script to snow but I want snow follow me and she also does not want to stay I press one to the letter e the more it loose flake by flake not all at once.

Script :

Player = script.Parent.Parent
mouse = Player:GetMouse()

function onKeyDown(key)
    key = key:lower()
    if key == "e" then
        p = Instance.new("Part")
        p.Parent = game.Workspace
        p.Size = Vector3.new(1,1,1)
        p.formFactor = ("Symmetric")
        p.Shape = ("Ball")
        p.TopSurface = ("Smooth")
        p.BottomSurface = ("Smooth")
        p.BrickColor = BrickColor.new("White")
        p.Anchored = false
        p.CanCollide = false
        p.Locked = true
        p.Position = Vector3.new(math.random(-100,100), 100, math.random(-100,100))
    end
end

mouse.KeyDown:connect(onKeyDown)

I want to press the e letter and make snow following me turn on and off

I'm from Brazil and is difficult to write anything wrong and translator's fault ;-;