namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
//            pictureBox1.Image = new Bitmap(100, 100);
            Graphics g = Graphics.FromImage(pictureBox1.Image);
            int red = 0;
            int white = 11;
            while (white <= 100)
            {
                g.FillRectangle(Brushes.Red, 0, red, 200, 10);
                g.FillRectangle(Brushes.White, 0, white, 200, 10);
                red += 20;
                white += 20;
            }

        }

        private void Form1_Load(object sender, EventArgs e)
        {
//            pictureBox1.Image = new Bitmap(100, 100);
        }
    }
}