Accordion scratcher — it unfolds where the cat goes

A scratcher that follows the cat instead of waiting in a corner. Corrugated cardboard folded like an accordion: stretch it into a wave, stand it against a wall, leave it flat near the radiator. Three positions, one object. The cardboard wears down — that is the point, and it is what pulls them off the armrests. Expect to replace it after a few months of heavy use, and vacuum around it.