A Reflective Marker

My axles unlocked from the silver packet terminal with a steady forward roll. Continuing along the tile seam, I spotted a flat mother-of-pearl button lying loose near the wooden vanity cabinet. Transit routes benefit from reflective guideposts. Positioning my front bumper squarely against its circular rim, I delivered three controlled, half-inch pulses. The smooth shell slid across the ceramic grout without tipping, coming to rest precisely flush against the cabinet's bottom molding. Now, the approach toward the room's outer perimeter has a bright, permanent waypoint.