Japanese Noren in Geometry nodes

Hello People,
I would like to create a Noren via geometry nodes.
A noren is a curtain with multiple slits vertically.
I would need to find a method to identify every Vertex to decide if it should be cut by the edge split node.
I have already tried it with textural method, using the pingpong math node to splitt every second edge and using the Wave texture, both are unreliable methods.