Sora提示词：Grainy black and white night vision security camera footage

Grainy black and white night vision security camera footage inside a rustic barn. A flock of sheep is sleeping peacefully on the straw-covered floor, huddled near a large haystack on the left side. The camera is static and high-angled.

Suddenly, the side of the haystack twitches and bulges violently as if something is pushing from inside. The sheep instantly wake up in a panic, scrambling clumsily to stand up and backing away. They retreat rapidly, pressing themselves tightly against the far right wall, staring back at the hay in terror.

As the sheep huddle against the wall, a pitch-black, undefined shadow begins to emerge from the base of the haystack. The shadow stretches and elongates unnaturally across the floor towards the sheep, growing longer and longer like a dark stain, while the source remains hidden. The scene ends with the shadow almost reaching the trembling sheep. High contrast, ominous atmosphere.