How to use "backdrop" in a sentence

Less than ten minutes later, when the curtains opened again, the mirrors had been taken away, and the stage had been transformed into an ice rink; the second production number was done on skates against a winter backdrop so real that it made Elliot shiver.

She was peripherally aware of a soft, fire like glow from beyond the cleft, and of a mysterious figure silhouetted against that reddish backdrop