void scaling()
        {
            int maxx = 0;
            int minx = panel1.Width-1;
            int maxy = 0;
            int miny = panel1.Height - 1;
            foreach (Point p in mainpoint)
            {
                if (p.X > maxx)
                    maxx = p.X;
                if (p.X < minx)
                    minx = p.X;
                if (p.Y > maxy)
                    maxy = p.Y;
                if (p.Y < maxy)
                    miny = p.Y;
            }
            int width = maxx - minx;
            int height = maxy - miny;
            float k;
            if (width < height)
                k = panel2.Height / height;
            else
                k = panel2.Width / width;
            foreach (Point p in mainpoint)
            {
                float x = (p.X - minx) * k;
                float y = (p.Y - miny) * k;
                painter.DrawEllipse(new Pen(Color.Blue),x,y,1,1);
            }
        }