[Arun Prasad]"The first part uses the hair render in C4D with transparency for the fall off.
For the second part I would just duplicate the path, and use a gradient stroke as a luma matte for the falloff.
I have no idea how to do either of those things. C4D I'm sure would just take some learning, but as far as I know, there is no such thing as a gradient stroke in After Effects. You could use the echo effect.