用C#画滑动的圆

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

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

        private void button1_Click(object sender, EventArgs e)
        {
            Graphics DrawInterface = panel1.CreateGraphics(); //在panel1里显示图像

            Pen MyPenControl = new Pen(Color.FromName("Control"), 5);
            Pen MyPenBlue = new Pen(Color.Blue, 5);
            Pen MyPenRed = new Pen(Color.Red, 5);

            for (int i = 1; i < 25; i++)
            {
                Rectangle TempRect = new Rectangle(100 + 10 * i, 20 * i, -100, -100);
                DrawInterface.DrawEllipse(MyPenRed, TempRect);
                Thread.Sleep(100);
                DrawInterface.DrawEllipse(MyPenBlue, TempRect); //用不同颜色的笔交替画
                Thread.Sleep(20);
                DrawInterface.DrawEllipse(MyPenControl, TempRect);
            }
        }
    }
}