private void button1_Click(object sender, EventArgs e)
        {
            Random ran = new Random((int)DateTime.Now.Ticks);
            Point point = this.Location;
            for (int i = 0; i < 40; i++)
            {
                this.Location = new Point(point.X + ran.Next(8) - 4, point.Y + ran.Next(8) - 4);
                System.Threading.Thread.Sleep(15);
                this.Location = point;
                System.Threading.Thread.Sleep(15);
            }
        }