This example demonstrates a minimal Three.js scene featuring a rotating green cube rendered with WebGL. The code sets up a perspective camera, a box geometry with basic mesh material, and an animation loop that updates the cube’s rotation each frame. It uses Three.js’s `Scene`, `PerspectiveCamera`, `WebGLRenderer`, and `requestAnimationFrame` to create the 3D visualization. The page also includes a static HTML message styled with CSS, while the JavaScript for the cube is embedded directly in the document.