animate in jquery

$("#someElement").fadeOut(100).fadeIn(100).fadeOut(100).fadeIn(100);$( "#clickme" ).click(function() {
  $( "#book" ).animate({
    opacity: 0.25,
    left: "+=50",
    height: "toggle"
  }, 5000, function() {
    // Animation complete.
  });
});
$("#Friends").animate({ 
        top: "-=30px",
      }, duration );how to add css for ::before event in jquery