body {
  margin: 0px 0px 1px 0px; /* the extra 1px allows the iOS inner/outer check to work */
  background: #000000;
}

#orientation {
  margin: 0 auto;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url(orientation.jpg);
  background-repeat: no-repeat;
  background-position: center;
  background-color: #000000;
  z-index: 999;
  display: none;
}

#gameBackgroundA {
  margin: 0 auto;
  position: absolute;
  top: 0;
  left: 0;
  width: 0px;
  height: 0px;
  background-repeat: repeat-y;
  background-position: bottom right;
  background-color: #1f1f1f;
  z-index: -1;
  display: block;
}
#gameBackgroundBottomA {
  margin: 0 auto;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0px;
  height: 0px;
  background-image: url(wall_prison.png);
  background-repeat: repeat-y;
  background-position: top right;
  background-color: #3e3e3e;
  z-index: 2;
  display: block;
}
#gameBackgroundB {
  margin: 0 auto;
  position: absolute;
  top: 0;
  right: 0;
  width: 0px;
  height: 0px;
  background-repeat: repeat-y;
  background-position: bottom left;
  background-color: #1f1f1f;
  z-index: -1;
  display: block;
}
#gameBackgroundBottomB {
  margin: 0 auto;
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0px;
  height: 0px;
  background-image: url(wall_prison-flop.png);
  background-repeat: repeat-y;
  background-position: top left;
  background-color: #3e3e3e;
  z-index: -2;
  display: block;
}