title: setInterval with different time duration
body: <p>Below code initiates a loop for a slideshow. When the first cycle of slideshow is complete, I want to pause on the first slideshow for 6000ms. Under this condition, I want to be able to add the time as 6000ms instead of 1000 ms.</p>
  
  <pre><code>this.isPlaying = setInterval(function(){
                  self._change(null, "-=", null, self.lineScrollDo, null);
              }, 1000);
  </code></pre>