* {
  margin: 0;
  padding: 0;
}

body {
  text-align: center;
  background: #232323;
}

.container {
  height: 100vh;
  width: 100vw;
  display: flex;
  justify-content: center;
  align-items: center;
}

.demo {
  width: 350px;
  height: 50px;
  animation: typing 2s steps(12),
            blink .5s step-end infinite alternate;
  white-space: nowrap;
  overflow: hidden;
  border-right: 3px solid #fff;
  font-family: monospace;
  font-size: 3rem;
  color: #fff;
}

@keyframes typing {
  from {
    width: 0;
  }
}

@keyframes blink {
  50% {
    border-color: transparent;
  }
}