body {
  margin: 0;
  overflow: hidden; 
  background-color: #111;
  background-image: url("dark.gif");
  background-size: cover;
  background-repeat: no-repeat;

}


.black-hole {
  position: absolute;
  top: 20%; 
  left: 50%;
  transform: translateX(-50%); 
  width: 300px;
  height: 300px;
  background-image: url("hole.png"); 
  background-size: cover;
  z-index: 2;
  border-radius: 50%; 
  animation: rotate 5s linear infinite;
}

@keyframes rotate {
  from {
    transform: translateX(-50%) rotate(0deg);
  }
  to {
    transform: translateX(-50%) rotate(360deg);
  }
}

@media (max-width: 768px) {
    
}