4/11 In front of him, at chest level, were the lights and levers he had been taught to use. Under each lever were three lights - red,white. and blue. the red light was on all the time. The blue light came on every two minutes for a few seconds. This meant he had to pull that lever. If he did, the white light flashed. If he didn't he got a mind electric chock. He had learned to avoid that shock.