---

 private void Form1_Paint(object sender, PaintEventArgs e)
 {
     Random r = new Random();

     int x1 = 400;
     int y1 = 300;
     int x2, y2;

     for (int i = 0; i < 100; i++)
     {
         Pen pen = new Pen(Color.FromArgb(r.Next(256), r.Next(256), r.Next(256)), 3);

         x2 = x1 + r.Next(-100, 100);
         y2 = y1 + r.Next(-100, 100);

         e.Graphics.DrawLine(pen, x1, y1, x2, y2);

         x1 = x2;
         y1 = y2;
     }

 }