A rotating cube of 64 colorful spheres demonstrates a 3D grid visualization using Three.js. The spheres, arranged in a 4×4×4 lattice with 1.2-unit spacing, each display a hue derived from their Cartesian coordinates. The scene uses directional and ambient lighting, with interactive orbit controls for camera navigation. WebGL rendering through Three.js’s `WebGLRenderer` provides real-time animation as the entire structure spins along its axes.