Not our hardware robot spider but just a software version of a spider. It creeps and crawl on her web on your screen.
This web was spun using sinusoidal functions, distance tensioners, and pin constraints to hold it all up. Initially the spider was really good at playing Twister by itself (too good), and not so much at crawling. The solution to help the spider crawl was to create a quadrant off the spiders origin and axis. Each leg is designated a quadrant (2 legs per quadrant) that the spider steps into. The spider can be pulled off the web.
The source of this spider can be found at: Verlet spiderweb.