I am trying to make this Rhino model using Grasshopper. The task is to create a base XY grid with lines in the Z direction (whose heights are a variable) on each of the grid points. The second part is to create a geometry (a simple sphere to start) that will intersect these lines. The reason it is complicated is because I want to split the lines where the geometry intersects them so that the lines within the sphere and the lines outside of it are disconnected. Then I need to mark these end points using small spheres as markers to identify where the lines are broken.

If anyone can help it would be much appreciated. I'm a beginner and this might be a simple solution so I am sorry if it sounds like a dumb question.