Step four of tying a Celtic Button knot gives a complete first pass; The knot then looks like a four leaf flower ready to be tightened into a sphere around the main part.
<a href="//commons.wikimedia.org/wiki/User:Cobanyastigi" title="User:Cobanyastigi">Cobanyastigi</a>
<span class="int-own-work" lang="en">Own work</span>