CodePen

HTML

            
              <div>
  Enter password
  <br />
  <br />
  <input type="password" value="password" />
</div>
            
          
!

CSS

            
              body {
  font-family: "Helvetica Neue", Helvetica;
  width: 50%;
  background-color: black;
  margin: 75px auto 0 auto;
  text-align: center;
  color: white;
}
            
          
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JS

            
              /* jquery.js */
/* jquery.velocity.js */
/* velocity.ui.js */

setInterval(function() {
  $("div").velocity("callout.shake");
}, 2000);
            
          
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