title: VelocityJS: use stagger with custom sequence
body: <p>I'm trying to apply a stagger option to a custom velocity sequence.
  In my example, I'm using the sequence from the documentation to simplify.</p>
  
  <p><strong>The sequence</strong></p>
  
  <pre><code>$.Velocity.Sequences.mySequence = function (element, options) {
      var duration = options.duration || 750;
      $.Velocity.animate(element,
          { 
              translateY: "-=10px",
          }, { 
              delay: duration * 0.033,
              duration: duration,
              loop: 3,
              easing: "easeInOutSine"
          });
  };
  </code></pre>
  
  <p><strong>The call (failing)</strong></p>
  
  <pre><code>$("div").velocity('mySequence', { stagger: 200 });
  </code></pre>
  
  <p><strong>The call (succeeding)</strong></p>
  
  <p>Stagger is occurring when I use any predefined sequence from the UI Pack.</p>
  
  <pre><code>$("div").velocity('callout.bounce', { stagger: 200 });
  </code></pre>
  
  <p>Live example: <a href="http://codepen.io/griable/pen/ncsmC" rel="nofollow">http://codepen.io/griable/pen/ncsmC</a></p>
  
  <p>Thanks in advance for helping</p>