* {
  background: repeat url("https://i.imgur.com/UepFEiw.gif");
}
body {
  background: repeat url("https://i.imgur.com/qYfKreS.gif");
  animation: pomni 0.25s linear infinite;
}
@keyframes pomni {
  0% {filter: hue-rotate(0deg) saturate(900)}
  10% {filter: hue-rotate(360deg) saturate(0)}
  20% {filter: hue-rotate(0deg) saturate(900)}
  100% {filter: hue-rotate(360deg) saturate(90000)}
}