#wrapper_bu {position: absolute; top: 0px;width: 100%;height: 100%;}

.txt_Center { margin: 50% 0% 0% 20% }

.txt_h1 { font-size: 2em }

.holder_bu { cursor: pointer; overflow: hidden; }

.holder_bu_awayL1 {
  position: absolute;
  top: 30%;
  left: 10%;
  width: 10%;
  height: 40%;
  z-index: 2;
  border:8px solid #fff;
  background-color: rgba(0,0,50,0.7);
  -webkit-transition: width 1s, height 1s, top 1s, left 1s;
  -moz-transition: width 1s, height 1s, top 1s, left 1s;
  -o-transition: width 1s, height 1s, top 1s, left 1s;
  -ms-transition: width 1s, height 1s, top 1s, left 1s;
  transition: width 1s, height 1s, top 1s, left 1s

}

.holder_bu_awayL2 {
  position: absolute;
  top: 40%;
  left: 0%;
  width: 20%;
  height: 40%;
  z-index: 1;
  border:8px solid #fff;
  background-color: rgba(0,0,50,0.5);
  -webkit-transition: width 1s, height 1s, top 1s, left 1s;
  -moz-transition: width 1s, height 1s, top 1s, left 1s;
  -o-transition: width 1s, height 1s, top 1s, left 1s;
  -ms-transition: width 1s, height 1s, top 1s, left 1s;
  transition: width 1s, height 1s, top 1s, left 1s
}

.holder_bu_center {
  position: absolute;
  top: 5%;
  left: 20%;
  width: 60%;
  height: 90%;
  z-index: 3;
  border:8px solid #fff;
  background-color: #37c;
  -webkit-transition: width 1s, height 1s, top 1s, left 1s;
  -moz-transition: width 1s, height 1s, top 1s, left 1s;
  -o-transition: width 1s, height 1s, top 1s, left 1s;
  -ms-transition: width 1s, height 1s, top 1s, left 1s;
  transition: width 1s, height 1s, top 1s, left 1s
}

.holder_bu_awayR1 {
  position: absolute;
  top: 30%;
  left: 80%;
  width: 10%;
  height: 40%;
  z-index: 2;
  border:8px solid #fff;
  background-color: rgba(0,0,50,0.7);
  -webkit-transition: width 1s, height 1s, top 1s, left 1s;
  -moz-transition: width 1s, height 1s, top 1s, left 1s;
  -o-transition: width 1s, height 1s, top 1s, left 1s;
  -ms-transition: width 1s, height 1s, top 1s, left 1s;
  transition: width 1s, height 1s, top 1s, left 1s
}

.holder_bu_awayR2 {
  position: absolute;
  top: 40%;
  left: 80%;
  width: 20%;
  height: 40%;
  z-index: 1;
  border:8px solid #fff;
  background-color: rgba(0,0,50,0.5);
  -webkit-transition: width 1s, height 1s, top 1s, left 1s;
  -moz-transition: width 1s, height 1s, top 1s, left 1s;
  -o-transition: width 1s, height 1s, top 1s, left 1s;
  -ms-transition: width 1s, height 1s, top 1s, left 1s;
  transition: width 1s, height 1s, top 1s, left 1s
}

#wrapper_bu img{ width: 100%; height: 100%; }