The aim of the project is to create a lightweight 3D library with a very low level of complexity — in other words, for dummies. The library provides <canvas>, <svg>, CSS3D and WebGL renderers.
This code creates a scene, a camera, and a geometric cube, and it adds the cube to the scene. It then creates a <WebGL> renderer for the scene and camera, and it adds that viewport to the document.body element. Finally it animates the cube within the scene for the camera.
If everything went well you should see this.