.overlayBackground{
    position:fixed;
    /* https://www.toptal.com/designers/subtlepatterns/ */
     /*background:url(http://subtlepatterns2015.subtlepatterns.netdna-cdn.com/patterns/geometry2.png);*/
     /*background:url(http://subtlepatterns2015.subtlepatterns.netdna-cdn.com/patterns/watercolor.png);*/
     background:url(http://subtlepatterns2015.subtlepatterns.netdna-cdn.com/patterns/photography.png);
     /*
     fabric_of_squares_gray
     subtle_grunge.png
     */
    -webkit-animation:100s scroll infinite linear;
    -moz-animation:100s scroll infinite linear;
    -o-animation:100s scroll infinite linear;
    -ms-animation:100s scroll infinite linear;
    animation:100s scroll infinite linear;
    z-index: -999;
    top:0;
    left:0;
    width:100%;
    height:100%;
  }


@-webkit-keyframes scroll{
    100%{
      background-position:0px -3000px;
    }
  }

  @-moz-keyframes scroll{
    100%{
      background-position:0px -3000px;
    }
  }

  @-o-keyframes scroll{
    100%{
      background-position:0px -3000px;
    }
  }

  @-ms-keyframes scroll{
    100%{
      background-position:0px -3000px;
    }
  }

  @keyframes scroll{
    100%{
      background-position:0px -3000px;
    }
  }