hello,I need help. I don't know why my code isn't workings, especially these nodes

You need to add “Math.” before PI for it to work.

Also I think you need a sequence instead of range.

I have just uploaded a example script for creating a arch bridge in a different topic here(Error at the nodes - #5 by Brendan_Cassidy) that might be able to be a good learning tool.

Mvoed a few posts to the topic here: Error at the nodes

I’m closing this topic to help keep things in one place.