/* CSS is how you can add style to your website, such as colors, fonts, and positioning of your
   HTML content. To learn how to do something, just try searching Google for questions like
   "how to change link color." */

body {
  background-color: black;
  text-align: center;
  color: white;
}

img {
  display:block;
  margin-left:auto;
  margin-right:auto;
  width: 640px;
  border:3px solid white;
  animation: glow 2s infinite alternate;
}

@keyframes glow {
 from {
   box-shadow: 0 0 0px 3px #222, 0 0 0px 7px #111;
 }
 to {
   box-shadow: 0 0 0px 10px #888, 0 0 0px 20px #444;
 }
  
}