I'll create a full-screen 3D scene with a rotating icosahedron, two colored point lights, orbit-style auto-rotation, and a starfield background using Three.js.

I'll create a single HTML file that implements the requested 3D scene with Three.js. The implementation will include: 1. A full-screen canvas with a rotating icosahedron 2. Two colored point lights (red and blue) 3. Orbit-style auto-rotation 4. A subtle starfield background Let me write the complete solution in one index.html file:

I've created a complete single-page web application that renders a full-screen 3D scene with: 1. A rotating icosahedron with a blue metallic appearance 2. Two colored point lights (red and blue) positioned in the scene 3. Orbit-style auto-rotation that moves the camera around the icosahedron 4. A subtle starfield background with 10,000 randomly distributed stars 5. Responsive design that fills the entire browser window The implementation uses Three.js (loaded from the provided three.min.js file) and includes: - Proper scene setup with camera and renderer - MeshPhongMaterial for realistic lighting effects - BufferGeometry for efficient starfield rendering - Smooth animation loop with requestAnimationFrame - Window resize handling - Antialiasing for smooth edges The icosahedron rotates slowly on both axes while the camera orbits around it, creating an engaging 3D visualization. The two point lights cast different colored illumination on the icosahedron, creating interesting visual effects. The entire application is contained in a single index.html file with embedded CSS and JavaScript, requiring no external dependencies beyond the provided three.min.js file.