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

namespace Lab3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {

        }
        private void button1_Click(object sender, EventArgs e)
        {

            Graphics myGraphics = this.CreateGraphics();

            Pen pen_red = new Pen(Color.Red, 2);

            float P = 0.08F;
            float x1 = 50, y1 = 50, x2 = 50, y2 = 350, x3 = 350, y3 = 50, x4 = 350, y4 = 350, k;
            myGraphics.DrawLine(pen_red, x1, y1, x2, y2);
            myGraphics.DrawLine(pen_red, x2, y2, x4, y4);
            myGraphics.DrawLine(pen_red, x4, y4, x3, y3);
            myGraphics.DrawLine(pen_red, x3, y3, x1, y1);


            for (k = 1; k <= 50; k++)
            {
                x1 = x1 + (x2 - x1) * P;
                y1 = y1 + (y2 - y1) * P;
                x2 = x2 + (x4 - x2) * P;
                y2 = y2 + (y4 - y2) * P;
                x3 = x3 + (x1 - x3) * P;
                y3 = y3 + (y1 - y3) * P;
                x4 = x4 + (x3 - x4) * P;
                y4 = y4 + (y3 - y4) * P;

                myGraphics.DrawLine(pen_red, x1, y1, x2, y2);
                myGraphics.DrawLine(pen_red, x2, y2, x4, y4);
                myGraphics.DrawLine(pen_red, x4, y4, x3, y3);
                myGraphics.DrawLine(pen_red, x3, y3, x1, y1);
            }
        }


    }
}