3d-interface/include/nav.php

        <nav>
            <ul>
                <li><a href="/">Index</a></li>
                <li><a href="/bouncing/">Bouncing cube</a></li>
                <li><a href="/multisphere/">Multi-sphere</a></li>
                <li><a href="/scene/">Prototype</a></li>
                <li><a href="/stream/">Streaming simulator</a></li>
            </ul>
        </nav>