Semaforo en C# usando el Beep (Aplicacion de consola)

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

namespace semaforo_uadec_consola
{
    class Semáforo
    {
        static void Main(string[] args)
        {
            int i = 0, c = 0;

            Console.BackgroundColor = ConsoleColor.Cyan;
            Console.ForegroundColor = ConsoleColor.DarkGreen;
            Console.Clear();
         
           
           
          //  for (i = 0; i <= 10; i++);
           
            do
            {
                i++;
                c++;

                if (c == 1) Console.Write("UNIVERSIDAD");
                Console.WriteLine();
                if (c == 2) Console.Write("            AUTONOMA");
                Console.WriteLine();
                if (c == 3) Console.Write("                      DE");
                Console.WriteLine();
                if (c == 4) Console.Write("                        COAHUILA");
                Console.WriteLine();
                if (c == 5) Console.Write("UNIVERSIDAD AUTONOMA DE COAHUILA");
                Console.WriteLine();
                if (c == 6) Console.WriteLine("");
                Console.WriteLine();
                if (c == 7) c = 0;
                Console.WriteLine();
               
                System.Threading.Thread.Sleep(500);
                Console.Beep();
                Console.Clear();
                if (i == 35) break;

            } while (true);
            Console.ReadKey();          

           }

    }
}