Mine

for (int i = 0; i < TrafficGrid.EastCars.Length; i++)
                        {

                            if (TrafficGrid.EastCars[i] != null)
                            {
                                //Car going East
                                Point cpt = new Point(tmp3, Convert.ToInt32(rect.Left + 370));
                                Point w1 = new Point(tmp3, Convert.ToInt32(rect.Left + 380));
                                Point w2 = new Point(tmp4, Convert.ToInt32(rect.Left + 380));

                                //tmp3 += increm;
                                //tmp4 += increm;

                                if (tmp3 == 370)
                                {
                                    tmp3 = tmp3 + 210;
                                    tmp4 = tmp4 + 210;
                                }

                                drawCar(g, cpt, w1, w2, "East");
                            }
                            tmp3 += increm;
                            tmp4 += increm;

                        }