Create blinking text without a timer [C#]

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();
}
}
}

Code

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();

  }

  }

}