body {
  background-image:
    radial-gradient(at 50% 40%, #fff, transparent 80%),
    radial-gradient(at 50% -50%, #0df, transparent 80%),
    radial-gradient(at 100% 0, #bd29d0 0, transparent 30%),
    radial-gradient(at 100% 100%, #faa, transparent),
    radial-gradient(at 0 100%, #ff0, transparent);
  background-attachment: fixed;
}