InvisibleLockscreen.TransparentLockSaver.DoUpdate C# (CSharp) Method

        void DoUpdate()
        {
            if (interval == 5)
            {
                pixies.Add(new Sprite(this));
                interval = 0;
            }
            interval++;

            for (int i = 0; i < pixies.Count; i++)
                if (pixies[i].Update())
                {
                    pixies.RemoveAt(i);
                    i--;
                }
        }