src="https://unpkg.com/aos@next/dist/aos.js"></script>
<script>
    AOS.init();

    (function() {
        let headerVisible = false;
        document.getElementById("menu").addEventListener("click", function () {
            if (headerVisible === false) {
                document.getElementById("header").style.height = "290px";
                headerVisible = true;
            } else {
                document.getElementById("header").style.height = "50px";
                headerVisible = false;
          