A method and apparatus that provide for determining a multilayer switching path are disclosed. Each of the images appears when a specific light source is on and image disappears when the specific light is off. In another example, a pool or spa is illuminated by one or more multi-color light sources that may be employed as individually and independently controllable devices, or coupled together to form a networked lighting system to provide a variety of programmable andor coordinated color illumination effects in the pool or spa environment. The spacer member is placed over the grid so that when the animal moves across the spacer member its paws are supported on the top surface of the spacer while the nails extend through to contact the abrasive surface and the nails of the animal are trimmed. A vertically oriented mold assembly is used to manufacture the panels. An oral administration system having a nipple member and a syringe to fill the nipple member is disclosed.