text: $(document).ready(function(){
      initializeMenu();
  });
  
  function initializeMenu() {
      let body = $('body'),
          fab = $('button#fab-menu');
      
      body.removeClass('scrolled');
      fab.click(function(event){    
          body.toggleClass('menu-open');
      });
  
      let controller = new ScrollMagic.Controller();
      
      let fabScene = new ScrollMagic.Scene({duration: '100%'})
          .on('progress', function(event){
              if ("FORWARD" === event.scrollDirection) {
                  body.addClass('scrolled');
              } else {
                  body.removeClass('scrolled');
              }
          })
          .addTo(controller);
  }