Создаём мигающий текст без таймера [C#]

[TITLE]

Привет всем
Собственно вот сам код :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
namespace Lesson
{
  public partial class Form1 : Form
  {
  Color[] colors = new Color[4] { Color.Red, Color.Green, Color.Yellow, Color.Lime };
  public Form1()
  {
  InitializeComponent();
  Thread Back = new Thread(isBackGround);
  Back.IsBackground = true;
  Back.Start();
  }
  public void isBackGround()
  {
  Thread Back = new Thread(isBackGround);
  Back.IsBackground = true;
  for (int x = 0; x < 4; x++)
  {
  Thread.Sleep(1500);
  label1.ForeColor = colors[x];
  }
  Back.Start();
  }
  }
}