bootswatch/bower_components/font-awesome/src/_includes/examples/spinning.html

Bootswatch is a collection of themes for Bootstrap.

<section id="spinning">
  <h2 class="page-header">Spinning Icons</h2>
  <div class="row">
    <div class="col-md-3 col-sm-4">
      <p>
        <button class="btn btn-default btn-lg"><i class="fa fa-spinner fa-spin"></i></button>
        <button class="btn btn-default btn-lg"><i class="fa fa-refresh fa-spin"></i></button>
        <button class="btn btn-default btn-lg"><i class="fa fa-cog fa-spin"></i></button>
      </p>
    </div>
    <div class="col-md-9 col-sm-8">
      <p>
        Use the <code>fa-spin</code> class to get any icon to rotate. Works well with <code>fa-spinner</code>,
        <code>fa-refresh</code>, and <code>fa-cog</code>.
      </p>
{% highlight html %}
<i class="fa fa-spinner fa-spin"></i>
<i class="fa fa-refresh fa-spin"></i>
<i class="fa fa-cog fa-spin"></i>
{% endhighlight %}
      <p class="alert alert-success">
        <i class="fa fa-info-circle"></i> CSS3 animations aren't supported in IE8 - IE9.
      </p>
    </div>
  </div>
</section>