How to use icons to make an animated effect with JavaScript?

Javascript Web Development Object Oriented Programming

To use icons to make animated effect, the code is as follows −

Example

<!DOCTYPE html>
<html>
<head>
<style>
   #user {
      font-size: 60px;
      color:rgb(106, 33, 201);
   }
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      padding: 20px;
   }
</style>
<link
rel="stylesheet"
href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"/>
<body>
<h1>Animating Icon example</h1>
<div id="user" class="fa"></div>
<script>
   function userShift() {
      var userEle;
      userEle = document.getElementById("user");
      userEle.innerHTML = "";
      setTimeout(function() {
         userEle.innerHTML = "";
      }, 1000);
      setTimeout(function() {
         userEle.innerHTML = "";
      }, 2000);
   }
   userShift();
   setInterval(userShift, 4000);
</script>
</body>
</html>