private void Form1_Paint(object sender, PaintEventArgs e)
    {
            Graphics g = e.Graphics;
            Pen whitePen = new Pen(Color.White, 1);
            float height = 50.0f;
            float width = (float)(4 * (height / 2 / Math.Sqrt(3)));
            float y = height / 2;
            float x = 0;
            float row = 0.0f;
            y += row * height;
            float col = 1.0f;
            if (col % 2 == 1)
            {
                y += height / 2;
            }
            x += col * (width * 0.75f);
            PointF pt1 = new PointF(x, y);
            PointF pt2 = new PointF(x + width * 0.25f, y - height / 2);
            PointF pt3 = new PointF(x + width * 0.75f, y - height / 2);
            PointF pt4 = new PointF(x + width, y);
            PointF pt5 = new PointF(x + width * 0.75f, y + height / 2);
            PointF pt6 = new PointF(x + width * 0.25f, y + height / 2);
            g.DrawLine(whitePen, pt1, pt2);
            g.DrawLine(whitePen, pt2, pt3);
            g.DrawLine(whitePen, pt3, pt4);
            g.DrawLine(whitePen, pt4, pt5);
            g.DrawLine(whitePen, pt5, pt6);
            g.DrawLine(whitePen, pt6, pt1);
            whitePen.Dispose();
            g.Dispose();
    }