body {
    color: black;
}
a, a:visited, a:active, a:hover {
  color: grey;
}
footer {
  font-size:smaller;
}
@keyframes blink {
 0% {
    opacity: 1;
 }
 50% {
    opacity: 0;
 }
 100% {
    opacity: 1;
 }
}
blink {
  animation: blink 1s steps(1) infinite;
}