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(assets/images/orientation.png);
    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(assets/images/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(assets/images/wall_prison-flop.png);
    background-repeat: repeat-y;
    background-position: top left;
    background-color: #3e3e3e;
    z-index: -2;
    display: block;
  }