.lines {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  margin: auto;
  width: 90vw;
}

.lines .line {
  position: absolute;
  width: 1px;
  height: 100%;
  top: 0;
  left: 50%;
  background: rgb(0 0 0 / 10%);
  overflow: hidden;
}

.lines .line::after {
  content: "";
  display: block;
  position: absolute;
  height: 15vh;
  width: 100%;
  top: -50%;
  left: 0;
  background: -webkit-gradient(linear, left top, left bottom, from(rgb(255 255 255 / 0%)), color-stop(75%, #fff), to(#fff));
  background: linear-gradient(to bottom, rgb(255 255 255 / 0%) 0%, #fff 75%, #fff 100%);
  animation: run 7s 0s infinite;
  animation-fill-mode: forwards;
  animation-timing-function: cubic-bezier(0.4, 0.26, 0, 0.97);
}

.lines .line:nth-child(1) {
  margin-left: -25%;
}

.lines .line:nth-child(1)::after {
  animation-delay: 2s;
          animation-delay: 2s;
}

.lines .line:nth-child(3) {
  margin-left: 25%;
}

.lines .line:nth-child(3)::after {
  animation-delay: 2.5s;
          animation-delay: 2.5s;
}

@keyframes run {
  0% {
    top: -50%;
  }

  100% {
    top: 110%;
  }
}

@keyframes run {
  0% {
    top: -50%;
  }

  100% {
    top: 110%;
  }
}