<section class="glow-demo">
        <div class="glow">
            <span>G</span><span>L</span><span>O</span><span>W</span>
        </div>
</section>
body{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    scroll-behavior: smooth;  
}
section {
    height: 100vh;
    font-size: 80px;
    font-weight: bold;
    transition: all 200ms;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    background-position: 50% 50%;
    display: grid;
    place-items: center;
    z-index: 1;
    cursor: pointer;
    position: relative;
    padding: 20px;
}
.glow-demo {
    background: #111;
}
/*Waves*/
.glow span {
    color: #fff;
    transition: all 300ms;
}
.glow span:hover {
    text-shadow: 0 0 10px #0698a5,
                 0 0 30px #0698a5,
                 0 0 80px #0698a5,
                 0 0 120px #0698a5,
                 0 0 200px #0698a5;
}

External CSS

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External JavaScript

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