What are examples of imagery?

“Okonkwo’s wives had scrubbed the walls and the huts with red earth until they reflected light. They had drawn patterns on them in white, yellow and dark green.” (37)

"At such times, in each of the countless thatched huts of Umuofia, children sat around their mother's cooking fire telling storiees, or with their father in his obi warming themselves from a log fire, roasting and eating maize." (34)

“children saturday around their mothers cooking fire telling stories, or with their father in his obi warming themselves from a log fire”