int flag = 1;
        private void timer1_Tick(object sender, EventArgs e)
        {
            string str = "Properties.Resources._01";
            str.Replace(@"""","");
            switch (flag)
            {
                case 1:
                    this.pictureBox1.Image = Properties.Resources._01;
                    flag = 2;
                    break;
                case 2:
                    this.pictureBox1.Image = Properties.Resources._02;
                    flag = 3;
                    break;
                case 3:
                    this.pictureBox1.Image = Properties.Resources._03;
                    flag = 4;
                    break;
                case 4:
                    this.pictureBox1.Image = Properties.Resources._04;
                    flag = 5;
                    break;
                case 5:
                    this.pictureBox1.Image = Properties.Resources._05;
                    flag = 6;
                    break;
                ......................................................
                default :
                    break;
            }
        }