Hey L, I'll try to explain the best way I can--hope it makes sense...
You start to roll at the end your section of hair--just like you would with any other type of roller. Roll and let the hair overlap at least once, then you can begin to roll up the flexirod creating a spiral roll--once you rolled all the way to your scalp, bend the rod to hold in place. Once you actually try it, you may be able to figure out what I'm talking about. haha