title: How to make a label blink
body: <p>I have a <code>Stopwatch</code> in my form with <code>Interval = 1000</code> displayed in the <code>hh:mm:ss</code> format. </p>
  
  <p>When it reaches the 5th second it should start to blink the label background as green but so far I can only make the background color turn to green without any flash.</p>
  
  <p>This is how I turn the background color to green:</p>
  
  <pre><code>Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
      Label1.Text = SW.Elapsed.ToString("hh\:mm\:ss")
      If Label1.Text = "00:00:05" Then
          Label1.BackColor = Color.Green
      End If
  End Sub
  </code></pre>
  
  <p>How do I make the label blink?</p>