.preloader-scan {
  position: fixed;
  left: 30%;

  max-width: 400px;
  display: table;

  height: 50%;
  text-align: center;
}
.preloader-scan li:nth-child(1) {
  width: 5px;
}
.preloader-scan li:nth-child(2) {
  width: 1px;
}
.preloader-scan li:nth-child(3) {
  width: 2px;
}
.preloader-scan li:nth-child(4) {
  width: 2px;
}
.preloader-scan li:nth-child(5) {
  width: 2px;
}
.preloader-scan li:nth-child(6) {
  width: 4px;
}
.preloader-scan li:nth-child(7) {
  width: 5px;
}
.preloader-scan li:nth-child(8) {
  width: 4px;
}
.preloader-scan li:nth-child(9) {
  width: 1px;
}
.preloader-scan li:nth-child(10) {
  width: 3px;
}
.preloader-scan li:nth-child(11) {
  width: 3px;
}
.preloader-scan li:nth-child(12) {
  width: 5px;
}
.preloader-scan li:nth-child(13) {
  width: 2px;
}
.preloader-scan li:nth-child(14) {
  width: 3px;
}
.preloader-scan li:nth-child(15) {
  width: 3px;
}
.preloader-scan li:nth-child(16) {
  width: 4px;
}
.preloader-scan li:nth-child(17) {
  width: 5px;
}
.preloader-scan li:nth-child(18) {
  width: 4px;
}
.preloader-scan li:nth-child(19) {
  width: 3px;
}
.preloader-scan li:nth-child(20) {
  width: 2px;
}
.preloader-scan li:nth-child(21) {
  width: 5px;
}
.preloader-scan li:nth-child(22) {
  width: 2px;
}
.preloader-scan li:nth-child(23) {
  width: 4px;
}
.preloader-scan li:nth-child(24) {
  width: 3px;
}
.preloader-scan ul {
  height: 100%;
  display: table-cell;
  vertical-align: middle;
  list-style-type: none;
  text-align: center;
}
.preloader-scan li {
  display: inline-block;
  width: 2px;
  height: 50px;
  background-color: black;
}
.preloader-scan .laser {
  width: 130%;
  margin-left: -25%;
  background-color: red;
  height: 1px;
  position: absolute;
  top: 30%;
  z-index: 2;
  box-shadow: 0 0 4px red;
  animation: scanning 2s infinite;
}
.preloader-scan .diode {
  animation: beam 0.01s infinite;
}


@keyframes beam {
  50% {
    opacity: 0;
  }
}
@keyframes scanning {
  50% {
    transform: translateY(75px);
  }
}