old_contents: $(window).scroll(function(){
    $(".fade-out").css("opacity", 1 - $(window).scrollTop() / 800);
  });
  
new_contents: //Fade Out Elements while scrolling
  $(window).scroll(function(){
    $(".fade-out").css("opacity", 1 - $(window).scrollTop() / 800); //Decrese the value from '800' to fade-out fast and vice-versa
  });
  
subject: Update fadeOutElements.js