Browser console animation https://stackoverflow.com/a/48812316

console_animation.html

<script>

    (function() {
        var frame = 0;
        var frames = [
            "This",
            "is",
            "SPARTA!",
            " ",
            "SPARTA!",
            " ",
            "SPARTA!",
            " ",
            "SPARTA!",
            " ",
            "SPARTA!",
            " ",
            "SPARTA!",
            " ",
            "Kappa AlixcaN.Net"
        ];
        var showNext = () => {
            console.clear();
            console.log(
                `%c `,
                "background: red; color: white; font-size: 15px; padding: 3px 41%;"
            );
            console.log(
                `%c ${frames[frame]}`,
                "background: red; color: white; font-size: 25px; padding: 3px 40%;"
            );
            console.log(
                `%c `,
                "background: red; color: white; font-size: 15px; padding: 3px 41%;"
            );
            setTimeout(
                showNext,
                frames[frame] === "SPARTA!" || frames[frame] === " " ? 100 : 1500
            );
            // next frame and loop
            frame++;
            if (frame >= frames.length) {
                frame = 0;
            }
        };
        showNext();
    })();

</script>