body {
  background-color: black;
  background-image: url("https://i.pinimg.com/736x/b6/a6/b6/b6a6b618a47919d83b8d0134d127f9b7.jpg");
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: center;
  background-size: contain;
}
h1 {
  text-align: center;
  font-family: Comic Sans MS;
  color: white;
  text-anchor: middle;
}
button {
  border-radius: 30%;
  border: none;
  transition: 0.3s;
}

img {
  border-radius: 50%;
}

img:hover {
  animation: shake 0.5s;
  animation-iteration-count: infinite;
  transform: rotate(45deg);
}

.pos_img {
  position: absolute;
  width: 100%;
}