A server apparatus includes a communication interface and a controller configured to transmit and receive information via the communication interface, wherein the controller is configured to transmit an instruction for controlling light emission by a plurality of floor coverings, each floor covering including a light emitting element, to the plurality of floor coverings based on positional information for a first point where a pedestrian is located in an area where the plurality of floor coverings are disposed and positional information for a second point different from the first point in the area.