Gunter rig
<a href="//commons.wikimedia.org/wiki/User:Royas" title="User:Royas">Tomasz Rojek</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>, based on <a href="https://en.wikipedia.org/wiki/pl:user:Pixel" class="extiw" title="w:pl:user:Pixel">w:pl:user:Pixel</a> graphic