For completeness, i guess most people have seen the ant colony layouts?
<a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=IGJ2jMZ-gaI" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=IGJ2jMZ-gaI</a>
<a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=CmD5ahkOPAQ" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=CmD5ahkOPAQ</a>