* {
    margin: 0;
    padding-block-start: 0;
    box-sizing: border-box;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #000;

}


h2 {
    display: flex;
    color: transparent;
    font-size: 15vw;
}

h2 span {
    animation: animate 3s linear infinite;
    animation-delay: calc(0.1s*var(--i));
}

@keyframes animate {
    0% {
        color: #fff;
        filter: blur(2px) hue-rotate(0deg);
        text-shadow: 0 0 10px #00b3ff,
            0 0 20px #00b3ff,
            0 0 40px #00b3ff,
            0 0 80px #00b3ff,
            0 0 120px #00b3ff,
            0 0 200px #00b3ff,
            0 0 300px #00b3ff,
            0 0 400px #00b3ff;
    }

    30%,
    70% {
        color: #fff;
        filter: blur(2px) hue-rotate(360deg);
        text-shadow: 0 0 10px #00b3ff,
            0 0 20px #00b3ff,
            0 0 40px #00b3ff,
            0 0 80px #00b3ff,
            0 0 120px #00b3ff,
            0 0 200px #00b3ff,
            0 0 300px #00b3ff,
            0 0 400px #00b3ff;
    }

    100% {
        color: transparent;
        box-shadow: none;
        filter: blur(2px) hue-rotate(0deg);
    }
}