Zipper animation (opening)
<p><a href="//commons.wikimedia.org/wiki/User:Luigi_Chiesa" title="User:Luigi Chiesa">Luigi Chiesa</a> (original) - 
</p>
<a href="//commons.wikimedia.org/wiki/User:Waugsberg" title="User:Waugsberg">Waugsberg</a> (modification)
Original draw by <a href="//commons.wikimedia.org/wiki/User:Luigi_Chiesa" title="User:Luigi Chiesa">Luigi Chiesa</a>