<h1>Hover on me for animation!</h1>
<div class="head">
   <div class="left-eye"></div>
   <div class="right-eye"></div>
   <div class="mouth"></div>
   <div class="z-1 z">Z</div>
   <div class="z-2 z">Z</div>
   <div class="z-3 z">Z</div>
</div>