@import url('https://fonts.googleapis.com/css?family=Baloo+Thambi');
body{
  color: #111;
  background-color: #000;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  font-family: 'Baloo Thambi', cursive;
  font-size: 5rem;
}
.container > span{
  animation: glow 2.75s ease-in-out infinite;
}
@keyframes glow{
  0%, 100%{
    color: #fff;
    text-shadow: 0 0 12px lime, 0 0 50px lime, 0 0 100px lime;
  }
  10%, 90%{
    color: #111;
    text-shadow: none;
  }
}
.container > span:nth-child(2){
  animation-delay: 0.25s;
}
.container > span:nth-child(3){
  animation-delay: 0.5s;
}
.container > span:nth-child(4){
  animation-delay: 0.75s;
}
.container > span:nth-child(5){
  animation-delay: 1s;
}
.container > span:nth-child(6){
  animation-delay: 1.25s;
}
.container > span:nth-child(7){
  animation-delay: 1.5s;
}
.container > span:nth-child(8){
  animation-delay: 1.75s;
}
.container > span:nth-child(9){
  animation-delay: 2s;
}
.container > span:nth-child(10){
  animation-delay: 2.25s;
}
.container > span:nth-child(11){
  animation-delay: 2.5s;
}