<script src="http://code.jquery.com/jquery-1.8.2.min.js"></script>

<script>
$(function() {
    /**
     *
     */
    var container = $('.container');

    setInterval(function() {
        if(container.hasClass('active')) {
            container.removeClass('active');
        }
        else {
            container.addClass('active')
        }

    }, 732);

});


</script>

<style>
    .container {
        width:10px;
        height:10px;
        background: red;
    }
    .container.active {
        width:20px;
        height:20px;
    }
</style>


<div class='container'></div>