Creating a curve following a surface

Hey everyone!! I am new to Dynamo geometry and a bit inexperienced. I am trying to create a curve that follows a surface as showen in the photos below



What i have reached until now is this

Thank you very much for help!!!

Try
image


intersect.dyn (22.6 KB)

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I think it’s more of an ‘intersect with a cylinder’ than a plane, as the plane will result in straight lines along the side rather than curved ones.

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Thank you very much for help!!! Really appreciate it

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