Node scripting

Hi all - I was wondering if any of you out there, my Flash brothers and sisters, could help me with the actionscripting found in the animation at this site;
http://www.adhoc-nets.de/

  • Any idea how those blacklines appear when 2 or more nodes cross paths?
  • how to bring everything to a halt?
    Absolutely anything would help.
    Thanks again.
    F-pilot