July 6th Cobwebs

I definitely have Winter Brain, and it is full of cobwebs. Unfortunately when I look outside, I am not the only one with cobwebs. Our poor garden furniture has them as well. One spider sure as heck went to a lot of work on this one. I wonder if when they weave their webs, if they have a pattern in mind, or if there is an automatic GPS system which comes in to play? For example do they hear - in the next 5 seconds take a sharp left; at the roundabout please take the third exit; when it is safe to do so, please turn around, when it is safe to do so, please turn around.