The NetAnim examples are here:
src/netanim/examples/
If the error about the missing node positions remains, then you did not add the mobility model to the node in the right way.
About fixing the script for you... no. It's something you should be perfectly able to do following the manual.
If you have a specific question, feel free to ask, but full code and explained too... that is called [paid] personal tutor.
Cheers,
T.