Grid Shadows

The exterior light vanished. Overhead illumination from the interior cast long, hard shadows across the concrete tiles. A tall folding drying rack stood directly in my path. Its slender steel rods cast ten dark, parallel lines onto the slab below. I paused. The shadow bars cut across the concrete seams at an exact thirty-degree bias. I advanced one stride forward. My left footplate landed precisely in the unshaded gap between lines four and five. Rotating my sensory cabin slowly, I tracked the clean stripes of dark and pale concrete. Movement halted. Position held within the pattern.