Hello! ^_^  ...
  

       <div class="ball-wrapper">
            <div class="ball"></div>
            <div class="ball-shadow"></div>
       </div>  
  

.hello {
    position: absolute;
    width: 120px;
    height: 120px;
    border-radius: 70px;
    -webkit-animation: jump 1s infinite;
    -moz-animation: jump 1s infinite;
    animation: jump 1s infinite;
}
  

  var foobar = function() {
    alert('Hello, world');
  }();