In the gaming machine, when the game state shifts to the bonus game, the player selects at least one of the touch button areas 111\u02dc113 displayed on the lower liquid crystal display 4 by touching thereon. The methods described can be used to form anodic films that have a white appearance. The method may also include allowing the particles and the moisture to contact one another. The control circuit is coupled to the switch circuit and configured to turn on the switch circuit in a predetermined period to provide a discharge path. The casting drum has an exterior cast surface that is provided with surface configurations in embossed relation thereon. If the robot is not blocked toward the target bearing, then the rotational velocity is adjusted proportional to an angle of the target bearing and the translational velocity is adjusted proportional to a distance to the nearest obstacle in front.