using System;
using System.Threading;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
int hrs = 0, min = 0, sec = 0;
Console.CursorVisible = false;
while (true)
{
sec++;
if (sec == 60)
{
sec = 0;
min++;
if (min == 60)
{
min = 0;
hrs++;
if (hrs == 24) hrs = 0;
}
}
Console.Write("{0:00}:{1:00}:{2:00}", hrs, min, sec);
Thread.Sleep(1000); // c# Sleep(Int32 milliseconds)
Console.Clear();
if (hrs == 1) break;
}
}
}
}