<a href="#">TIKLA</a>
<div></div>

a{display: inline-block; background: #00FF99; padding:20px; border-bottom:4px solid #00CC00; color:#00CC99; text-decoration:none; margin-bottom:20px;}
div{background: red; width:150px; height:150px;}

jQuery.fx.interval = 200;
$( "a" ).click(function() {
  $( "div" ).toggle( 4000 );
});