kulka

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;
using System.Windows.Forms.VisualStyles;

namespace kulka_kolos_karna
{
    public partial class Form1 : Form
    {
        public Random gen = new Random();
        public Pen pioro = new Pen(Color.Black, 8);
        public DateTime start;
        public DateTime stop;
        public kulka kula = new kulka(0,0,40,40);
        public int x = 350;
        public int y = 200;
        public Form1()
        {
            InitializeComponent();
        }
        //gen.Next(0,1000);
        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            g.DrawEllipse(pioro, kula.x, kula.y, kula.w, kula.h);
        }

        public class kulka
        {
            public int x, y, h, w;

            public kulka(int sx,int sy, int sh, int sw)
            {
                x = sx;
                y = sy;
                h = sh;
                w = sw;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            x = gen.Next(0, 700);
            y = gen.Next(0, 380);
            kula = new kulka(x,y,40,40);
            start = DateTime.Now;
            panel1.Refresh();
        }

        private void panel1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.X > kula.x - 10 && e.X < kula.x + 10 && e.Y < kula.y + 10 && e.Y > kula.y - 10)
            {
                kula.h = kula.h / 2;
                kula.w = kula.w / 2;
                kula.x = gen.Next(0, 700);
                kula.y = gen.Next(0, 380);
                panel1.Refresh();
            }

            if (kula.w <= 8 && kula.h <= 8)
            {
                stop = DateTime.Now;
                TimeSpan czas = stop - start;
                MessageBox.Show("Brawo", $"Zajelo ci to : {czas.ToString()}", MessageBoxButtons.OK,
                    MessageBoxIcon.Information);
            }
        }

    }
}