An oxide composite particle of the present invention is composed of at least one fine gold particle contained in a matrix of an oxide particle or at least one fine gold particle supported fixedly on the surface of an oxide particle, and absorbs a visible light having a specific wavelength. The integrated circuit includes a hardwired specific logic technology portion and a programmable specific logic technology portion. The controller is arranged to present individual menusmenu items on the display, receive selection commands from a user through the user-controlled input device and in response perform functions related to the presented menusmenu items. Various other methods, systems, and computer-readable media are also disclosed. This allows the floors to roll when in a flat aspect suitable for dancing and when in a tall aspect suitable for passing through narrow passages.