设计界面

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.Threading;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Thread th;
        Random rand = new Random();
        int randnum;
        private void button1_Click(object sender, EventArgs e)
        {
            int x = 10;
            int y = 60;
            for (int i = 1; i