.matrix1 {
  background: linear-gradient(-45deg, #000000, #25f600, #000000, #0ba506);
  background-size: 400% 400%;
  animation: bgAnim 15s ease infinite;
  height: 100vh;
}

@keyframes bgAnim {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}