* {
  margin: 0;
  padding: 0;
}
header {
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background-color: #181818;
}
header h1 {
  font-size: 190px;
  position: absolute;
  overflow: hidden;
  color: transparent;
  -webkit-text-stroke: 1px #ffffff;
  font-family: "poppins", sans-serif;
  background-image: url(back.png);
  background-position: 0 0;
  -webkit-background-clip: text;
  animation: back 30s linear infinite;
}
@keyframes back {
  100% {
    background-position: 2000px 0;
  }
}