Old Agility article I have a better and safer plan. It is possible to hit the pvc right and it will roll and you could loose balance. This is pretty minor. I've had no problems, but this idea is also easy or easier.
The article will be coming soon, but for now, get some thin wood, think yard stick. It will make the step portion. Get the cheapest nylon strap you can get. Cut the wood to size and staple it to the strap...
BTW even cheaper is to paint or chalk it on the surface, if this is possible.
Generally the steps are made 18" apart, though you can vary this.
The article with picks will be about a month off, as I'm working a second job for 3 more weeks....
