The standard VEX IQ Challenge playing field is composed of (32x) floor tiles, (20x) straight wall
segments, and (4x) corner wall segments. Each floor tile is 1 foot (305mm) square and molded
in a very light grey plastic. Black lines 1 inch (25.4mm) wide for a “+” sign over the top of the tile;
these lines are used to determine robot starting squares, corner goals, and can be read by
advanced sensors on the robot.