When you sit down to write, your words convey a mood. This mood may change from one scene to anther, but mood itself is a tool that helps make your writing cohesive. It links the setting, dialog and actions as a whole. It's part of the author's voice. Today create a scene that uses the sky to establish the mood. It's a perfect tool to practice this prompt because whether you write fiction or non-fiction, every world has a sky. Use colors and movement to help create the mood.
For more information, read chapter 1 of my book Pumping Your Muse for inspiration.
If your not sure where to start, consider the following moods: