Animated Atkinson cycle.
<a href="https://en.wikipedia.org/wiki/User:Sowilo" class="extiw" title="en:User:Sowilo">Sowilo</a> at the <a class="external text" href="https://en.wikipedia.org/">English Wikipedia</a>
2006-08-27
<span class="int-own-work" lang="en">Own work</span>