KeyDown,KeyUp and Hold template

Player = game.Players.LocalPlayer
mouse = Player:GetMouse()
Hold = false
enabled = true

function Press(key)
    if enabled == true and key == "z" then
        enabled = false
        key = key:lower()
        Hold = true
        x = Instance.new("Part")
        x.Parent = Workspace
        x.Anchored = true
        x.CanCollide = false
        x.CFrame = Player.Character.Torso.CFrame
        counter = 0
        repeat wait()
           counter = counter +1
            x.Size = x.Size +Vector3.new(0.1,0.1,0.1)
        until Hold == false or counter >= 30
    wait()
    enabled = true
    end
end

function Release(key)
    key = key:lower()
    if key == "z" then
        Hold = false
    end
end

mouse.KeyDown:connect(Press)
mouse.KeyUp:connect(Release)