diff --git a/public/index.html b/public/index.html
index 6652c7dd60ad34f6d80148f3c8e6876702d19854..7d2fe4b28b2bfbf86d4294d9feb99308b06efb0f 100644
--- a/public/index.html
+++ b/public/index.html
@@ -1,23 +1,28 @@
-<!DOCTYPE html>
+<!doctype html>
<html>
- <head>
- <meta charset="utf-8">
- <meta name="generator" content="GitLab Pages">
- <title>Plain HTML site using GitLab Pages</title>
- <link rel="stylesheet" href="style.css">
- </head>
- <body>
- <div class="navbar">
- <a href="https://pages.gitlab.io/plain-html/">Plain HTML Example</a>
- <a href="https://gitlab.com/pages/plain-html/">Repository</a>
- <a href="https://gitlab.com/pages/">Other Examples</a>
- </div>
+<head>
+ <meta charset="UTF-8">
+ <meta name="viewport"
+ content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+ <title>Cube Demo</title>
- <h1>Hello World!</h1>
+ <!-- three.js -->
+ <script src="https://unpkg.com/three@0.126.0/build/three.js"></script>
+</head>
+<body>
- <p>
- This is a simple plain-HTML website on GitLab Pages, without any fancy static site generator.
- </p>
- </body>
-</html>
+<!-- Starting an immersive WebXR session requires user interaction.
+ We start this one with a simple button. -->
+<button onclick="activateXR()">Start Cube Demo</button>
+<script>
+async function activateXR() {
+ // Add a canvas element and initialize a WebGL context that is compatible with WebXR.
+ const canvas = document.createElement("canvas");
+ document.body.appendChild(canvas);
+ const gl = canvas.getContext("webgl", {xrCompatible: true});
+ // To be continued in upcoming steps.
+}
+</script>
+</body>
+</html>