how to make the lines disappear little by little ?

[Zik Dipa]

I made an wick with a curvy spline, I have placed the line and I also made an effect to follow the line, everything went smoothly but I am confused how when the effect crosses the line then the line disappears little by little following the effect that runs through the line?

I'm very happy if someone help me
thank you

[_Aka_]

Hi
If you make the line using a Curvy Line Renderer*, then you can use the parameters of the Line Renderer to define at what point the line disappears. Via scripting, you can synchronize the point of disappearance with the position of the effect.
I hope this helped
Have a nice day

* https://curvyeditor.com/documentation/components/curvylinerenderer