I have taken this image of my open front door as a close up which means the background isn't in focus, as the background if someone was outside the audience wouldn't be able to identify the person outside.

I had the door open as it makes the atmosphere tense, the audience will wonder who has opened the door. Someone may have broken entry or someone could have been taken from the house.

The red colours in the image could symbolise anger in a person or possibly blood, connoting that something traumatic may happen outside.