$(function( ){
  $('button').click(function() {
       
 $('.box').toggleClass('animated shake'); /*$('.box').removeClass('animated shake').addClass('animated shake'); */
  }); 

  $('.box').one('webkitAnimationEnd mozAnimationEnd MSAnimationEnd oanimationend animationend', function() {

    
    /*$('.box').removeClass('animated shake'); */
  }); 
  
  var timeout = function() {
$("iframe").toggleClass('animated shake');  
  
     setTimeout(function() { timeout(); }, 1500);
  };
  
   timeout();


 

});