styles.css

body {
    background-color: black;
    color: white;
}

.blinking-cursor {
  font-weight: 100;
  -webkit-animation: 1s blink step-end infinite;
  -moz-animation: 1s blink step-end infinite;
  -ms-animation: 1s blink step-end infinite;
  -o-animation: 1s blink step-end infinite;
  animation: 1s blink step-end infinite;
  width: .5em;
  display: inline-block;
  background-color: white;
  height: 1em;
}

@keyframes "blink" {
  from, to {
    background: transparent;
  }
  50% {
    background: white;
  }
}

@-moz-keyframes blink {
  from, to {
    background: transparent;
  }
  50% {
    background: white;
  }
}

@-webkit-keyframes "blink" {
  from, to {
    background: transparent;
  }
  50% {
    background: white;
  }
}

@-ms-keyframes "blink" {
  from, to {
    background: transparent;
  }
  50% {
    background: white;
  }
}

@-o-keyframes "blink" {
  from, to {
    background: transparent;
  }
  50% {
    background: white;
  }
}