vertical wooly paths HELP

I'm trying to create attractions between paths, I think it is because Im a beginner in kangaroo/grasshopper, but Im getting an error in a component. The logic in my definition is that the paths appear as the height changes, and then duplicate. my intention is that the paths take this behaviour

http://vimeo.com/19683593

Im attaching my definition if someone can take a look

If someone could help me it would be perfect.. Im a little stuck

Jorge