body {
  background-color: red;
  color: white;  
  font-family: "Courier New";
  text-align: center;
  margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

p {
  background-color: #fff;
  color: red;
  width: max-content;
  font-size: x-large;
  /*text-shadow: 3px 1px 3px #0000006e;*/
  margin-left: auto;
  margin-right: auto;
}

.blink {
  animation-duration: .75s;
  animation-name: input;
  animation-iteration-count: infinite;
  animation-direction: alternate;
  animation-timing-function: steps(2, jump-none);
}

  @keyframes input {
    from {
      color: white
    }
    to {
      color: transparent
    }
  }