---

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

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

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            var rand = new Random();
            Pen blackPen = new Pen(Color.Black, 1);

            int rows = 4;
            int cols = 5;

            int r = 40;
            int d = r * 2;
            int step = r + 25;

            int startX = 20;
            int startY = 20;



            Rectangle rect = new Rectangle(startX, startY, d, d);



            for (int i = 0; i < rows; i++)
            {
                for (int j = 0; j < cols; j++)
                {
                    int x = startX + j * step;
                    int y = startY + i * step;

                    rect.X = x; rect.Y = y;

                    HatchBrush hBrush = new HatchBrush(
                        HatchStyle.Horizontal,
                        Color.Red,
                        Color.FromArgb(rand.Next(0, 100), rand.Next(0, 255), rand.Next(0, 255), rand.Next(0, 255)));

                    e.Graphics.DrawEllipse(blackPen, rect);
                    e.Graphics.FillEllipse(hBrush, rect);
                }
            }
        }
    }
}