Creating a Scene That Establishes Mood and Pacing

How would you write a short fictional scene that uses vivid description to establish mood and pacing?

Envision your scene as a small part of a larger narrative. First, decide on a setting – both the place and time – and a point of view. You’re free to be as wild or as tame as you want when making these decisions. Make sure something happens in your scene so that you can establish the right pacing. Good ideas for a short scene include an exchange between two characters, a brief action sequence, or a single remarkable discovery, but each of these kinds of scenes should be appropriately paced.