What are some themes and symbols in "The Great Gatsby?" Explain You have to use 2 pieces of evidence to support your answer

The Eyes of Doctor T. J. Eckleburg

The eyes of Doctor T. J. Eckleburg are a pair of fading, bespectacled eyes painted on an old advertising billboard over the valley of ashes. They may represent God staring down upon and judging American society as a moral wasteland, though the novel never makes this point explicitly. Instead, throughout the novel, Fitzgerald suggests that symbols only have meaning because characters instill them with meaning. The connection between the eyes of Doctor T. J. Eckleburg and God exists only in George Wilson’s grief-stricken mind. This lack of concrete significance contributes to the unsettling nature of the image. Thus, the eyes also come to represent the essential meaninglessness of the world and the arbitrariness of the mental process by which people invest objects with meaning. Nick explores these ideas in Chapter 8, when he imagines Gatsby’s final thoughts as a depressed consideration of the emptiness of symbols and dreams.

Explanation:

one is a red flower, and one is the sky when the sun sets.