How does James Thurber use imagery in The Night the Ghost Got In?

Imagery:

I am sorry, therefore, as I have said, that I ever paid any attention to the footsteps.
They began about a quarter past one o’clock in the morning, a rhythmic, quick-cadenced walking around the dining-room table.

The steps kept going round and round the table; at regular intervals a board creaked, when it was trod upon.

Flashlights shot streaks of gleam up and down the walls, across the yard, down the walk between our house and Bodwell’s.