Anemone stop loop

I need help with anemone loops. I use a mesh and want to find the path of water flowing down. As soon as the lowest point is reached I want the loop to stop instead of continuing! Can someone help me with this? Anmerkung%202019-04-26%20193213|640x500

mesh.3dm (914.6 KB) (12.2 KB)

Use cull duplicates; i don’t know if it is possible to count the number of points from start to end

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