Making stairs

curve through pt_re.gh (23.9 KB)

Dear everyone,
I would like to make stairs from the split surface, but I’m not sure where my mistake is.
Please point out the mistake and provide the reason.

Best, Keisuke

Hello
you just forget that List Length work on list and not branches


So flatten to get the number of items, then Graft
Or use Tree Statistics

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curve through pt_reV2.gh (10.0 KB)

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curve through pt_re.gh (18.6 KB)

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Dear Laurent, HS_KIM, Seghier
Thank you for a lot of options and explanations!
I understood completely how it works out !

Very best, Keisuke