jQuery Animate Move Group

HTML

<p><button id="go">Run »</button></p>

<div class="block">1</div> 
<div class="block">2</div>
<div class="block">3</div> 
<div class="block">4</div>
<div class="block">5</div> 
<div class="block">6</div>

CSS

div {
   position: relative;
   background-color: #abc;
   padding: .25em .5em;
   float: left;
   margin: 5px;
}

JavaScript

$( "#go" ).click(function(){
  $( ".block:first" ).animate({
    left: 35
  }, {
    duration: 500,
    step: function( now, fx ){
      $( ".block:gt(0)" ).css( "left", now );
    }
  });
});