Tiny gravel specks hitch onto car tires during everyday drives. From road edges and driveways, these small particles stick quietly to the treads.
Each time the car pulls into the garage and parks, a few specks shake loose. They drop onto the concrete floor, scattering in small numbers with every arrival.
Over weeks of repeated parking, these specks add up incrementally. They spread across the surface, settling into cracks and gathering along walls.
In corners near the door, the specks form loose clusters from the steady additions. Footsteps nudge them slightly, but they remain in place overall.
Now, a fine scattering covers patches of the floor. Up close, the layered specks show the ongoing build-up, even as the garage appears unchanged.