modify animaiton usign three.js

I need someone to modify the below animation:
https://tympanus.net/Tutorials/InfiniteLights/index2.html

The modified animation should be the following:
- Get rid of the end curve.
- The lighting effects should be sped up to show lighting speeds.
- Get rid of the side railing bars.

See attached screenshot for a better explanation.
Budget: 40$
Deadline: 12 hrs.