Build a spooky-cute Halloween night toy in the browser (Three.js, single HTML page, no external assets: model and draw everything in code). A moonlit pumpkin patch on a hill with a crooked haunted house, drifting fog, bats and fireflies. In the center sits a big 3D jack-o'-lantern: drag on it with the mouse to carve its face, and the cuts glow from a flickering candle inside that lights up the ground around it. Ghosts drift out of the house and swirl around; click a ghost and it pops into a burst of candy. Lightning flashes now and then, and the camera slowly orbits on its own. It should feel magical the moment it loads.