Orb Spiders create webs that are nearly circular, with every new row almost exactly the same distance away from the previous one. No one knows why they use such precision, since they don't seem to catch any more prey than spider that spin webs that don't follow this pattern.
As an Orb Spider spins its web the number of segment increases. After one complete round, there are 13 segments, after the second cycle, there is a total of 26 segments. By the end of the 3rd cycle, there are 39 segments in total.
