Splitting List by every other 20

I’m trying to split a list of 720 triangles from a “Triangle Panels B” node into two lists that consist of every other 20. I can’t figure out how to do it through pattern culling or list splitting and can’t find anything similar online. Any help?

Partition List ?

I’ve never used that before, how would I do it?

Count seems to be 1+ number of divisions.

That works but only horizontally, I need it to work vertically

Flip Matrix afterwards ?
Actually it works on your file without that. Each branch contains one column, sorted from top to bottom.

It’s worked, :heart_eyes:

Thank you so much, I’ve been trying to do this for 2 hours -_-