Circles traced through the middle of the squares: each ring is a plain circle.
Straight, bent or tilted?
Pinna’s intertwining circles
Do the squares form spirals that weave through each other?
No: they sit in plain circles, one inside the other.
Why? Each little square is tilted and has a light and a dark edge. Your brain reads those tilts as the direction of the line, like in the Fraser spiral.
Picture: Bernhard Wiedemann, CC BY-SA 4.0