The spiders' intention is to come out of the sheltered place and spread. Two days after the previous photo, they have formed a line of web along which they start to move.
<a href="//commons.wikimedia.org/wiki/User:Annatsach" title="User:Annatsach">Annatsach</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>