Grasshopper animation

Hello. I am trying to make an animation using grasshoper. I animated the slider, but it has the opposite direction to what i want (first gif). I tried to flip the curves and although the direction is right, the pipes gradually disappear during the animation (second gif). Does anybody have any idea how can i achieve the direction of the second example , but without pipes’ disapperance.
Thank very much in advance.


This could be a workaround!


I’ve just animated a slider that moves the bounding box of the curves in z-direction. The curves are divided into points and points outside of the moving box produce a new line that is piped. (24.9 KB)

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