Choose a color and a temperature. Scan your memory for a moment in your life that matched that temperature and whose light or environment held that color. Set a 4-minute timer and on a single page, record sensory details from the scene. Don’t write in paragraphs, use lists or just write indiscriminately in fragments anywhere on the page.
Then take the details of that scene as you’ve surfaced them and give them to another voice. Let it be their fantasy or their nightmare. Let them tell the story to another, third person, who might occasionally weigh in with opinions. Write it in script form.