Ключевые слова: alarm, background, begin, black, button, call, close, control, down, electric, electrical, electricity, elevator, empty, end, energy, enter, finish, floors, go, green, home, illuminated, key, level, lift, light, motion, moving, off, pause, plastic, play, power, press, push, red, save, sign, start, stop, switch, symbol, up, wall, white,