.yoio {
  height: 100%;
  --x: 2%;
  --y: 20%;
  background: radial-gradient(circle at var(--x) var(--y), #f07820a6, #4440 25%);
  animation: a 0s ease-in-out -2.3s alternate infinite;
  animation-name: x, y;
  animation-duration: 15s, 10s;
}

@keyframes x {
  to {
    --x: 91% ;
  }
}
@keyframes y {
  to {
    --y: 20% ;
  }
}