Create a 10-second northern lights scene entirely in After Effects. Green, teal, and violet aurora curtains should ripple slowly across a starry night sky above a mountain range, with pine tree silhouettes framing a still lake that reflects the aurora. Add a shooting star, a soft glow, and subtle film grain. Build it procedurally with shape layers and Fractal Noise, no footage, and give me a controls layer for aurora speed, intensity, the three band colors, and star brightness so I can release it as a template.