http://wbpkh5001.17c.cn/html5/

gamecheat.js

function cheat() {
  var color1, color1box, color2, color2box;
  var boxes = document.querySelectorAll('#box > span'),
  boxLen = boxes.length;
  for (var i = 0; i < boxLen; i++) {
    var box = boxes[i],
      color = box.style.backgroundColor;
    if (i == 0) {
      color1 = color;
      color1box = box;
    } else if (!color2) {
      if (color != color1) {
        if (i > 1) {
          box.style.background = 'black';
          setTimeout(cheat);
          return;
        } else {
          color2 = color;
          color2box = box;
        }
      }
    } else {
      setTimeout(cheat);
      return;
    }
  }
}