The heat came, the war broke out in the office with a new force between the one who is hot and the one who is blowing. The room is large, air conditioning is built into the ceiling with a switch integrated in the wall. An indicator on the switch burns. After the phrase of one of the frozen "who turned on the blue light again!A plan was born. The lighthouse was glued with an opaque white film and a black spot was drawn with a marker on it. The air conditioner is always turned off. I noticed it only a week later when it was a little cold, and I turned on the condy too hard.