C# Console Application kronometre nasıl yapılır?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace kronometre
{
    class Program
    {
        static void Main(string[] args)
        {

            for (int j = 0; j < 60; j  )
            {

                for (int a = 0; a < 60; a  )
                {

                    for (int i = 0; i <= 99; i  )
                    {
                        if (Console.KeyAvailable)
                        { break; }

                        Console.WriteLine("{0}:{1}:{2}", j, a, i);
                        System.Threading.Thread.Sleep(10);
                        Console.Clear();
                    }
                }
            }
        }
    }
}