body
.Glow {
color: #04132a;
position: absolute;
top: 100%;
left: 50%;
transform: translate(-50%,-50%);
margin: 1;
font-family: 'Arial';
font-weight: 700;
font-size: 10em;
animation-name: animate;
animation-duration: 10s;
animation-direction: reverse;
animation-iteration-count: infinite;
padding:50px;
line-height:1;
text-transform:uppercase;
}
@keyframes animate {
0%,100%{ text-shadow:0 0 20px white; }
25%{ text-shadow:0 0 20px yellow; }
50%{ text-shadow:0 0 20px #00ff2a; }
75%{ text-shadow:0 0 20px #00fff7; }
}