How does Carol O'Connell use imagery in Mallory's Oracle?

Imagery:

"Edith screamed as a bright light washed out on the tableau and lit the entire basement with a blazing ball of sun mounted atop the guillotine." (pg. 102)

"The exterior wall in the first photograph was spattered with blood, and only patches of Siddon's fawn-colored suit were not soaked through with red." (pg. 124)