I think you need to read the web page you have provided more carefully.
If you have something in double and if it is related to physics, write it done in detail and I will try to help.
You need to sort out what you need to do and make a plan. You need to help yourself first.

For example: I do not know what kind of help you need? You did not even explain it in detail. (you just ask us to read the web page!  ;) ).