【正文】 one fine morning—so we beat on, boats against the current, borne back ceaselessly into the past. ( Fitzgerald, 2022:115)These words conclude the novel and find Nick returning to the theme of the significance of the past to dreams of the future, here represented by the green light. Nick remembers the night he saw Gatsby stretching his arms out to the water and realizes that the green light he saw was the light at the end of Daisy’s dock, and muses that Gatsby—whose wealth and success so closely echo the American dream had already ended, that his goals had bee hollow and empty. Nick senses that people everywhere are motivated by similar dreams and by a desire to move forward into a future in which their dreams are realized. Nick envisions their struggles to create that future as boats moving in a body of water against a current that inevitably carries them back into the past.What’s more, the color green can also stand for the meaning “go”. As in a traffic light signal, most people associate green with the word and action “go”. It means Gatsby should jump into action for his dream in a second. The color green indicates a drive to strive ahead in life, to gain a better life. Gatsby changes his name, which allows him to start his life from scratch and make it more like that of God—all in the ultimate goal of attaining Daisy. “He knew he had a big future in front of him.(Karen, 2022: 181).” his father says about him. “Jimmy was bound to get ahead. He always had some resolves like this…(Karen, 2022: 182).” He tries his best to be a more successful people in society. From childhood Gatsby makes arduous efforts to bee a wellknown, highly venerable person some day. The color green implies that Gatsby will do everything to win Daisy back and nothing can prevent them from being together. It is Gatsby’s determination and hope. Gatsby believes that he chooses a right way and all the things will be the same as before. WhiteWhite is the color of innocence. It is how the girls, Daisy and Jordan, are dressed in the beginning before their true characteristics are revealed. Jordan Baker talks about Daisy, “She was just eighteen, two years older than me, and by far the most popular of all the young girls in Louisville dressed in white, and had a little white car…” (Fitzgerald, 2022: 98)Fitzgerald is telling us that when Daisy was younger she symbolized innocence and purity. He also expresses that she had a “white girlhood on”. Before Daisy was married, her car, her clothes, the rooms of her house, and about half the adjectives used to describe her. Even her “white neck”, “white girlhood” the king’s daughter “high in a white palace” was described by the color “white”.White is the major color of Gatsby and Nick’s wardrobe. They are both portrayed as innocent. Gatsby never loses his childlike faith in his relationship with Daisy, and Nick claims he never lies and that he is one of the few honest people he knows.The author also describes the steps to Gatsby’s house as being white. Maybe what he was saying was that on the surface, the outside house looked innocent, but on the inside it was not.When the author depicts the valley of ashes “I followed him over a low whitewashed railroad fence”, The Valley of Ashes originally resembles something dark and lifeless, it is a dirty places. However, the railroad fence is white, which indicating the only clean and hopeful place for the poor. It stands for the moral and social decay that result from the uninhibited pursuit of wealth, as the rich indulge themselves with regard for nothing but their own pleasure. So “white” here represents the only and last innocent place in the valley of ashes, and it is the last hope of the morass of the poor. Symbolism in Settings East Egg and West EggSetting plays an important role in developing some of Fitzgerald’s themes. East Egg, West Egg, and the Valley of Ashes all assume symbolic significance. I lived at West Egg, thewell, the less fashionable of the two, though this is a most superficial tag to express the bizarre and not a little sinister contrast between them. My house was at the very tip of the egg, only fifty yards form the Sound, and squeezed between two huge places that rented for twelve or fifteen thousand a season.” “Across the courtesy bay the white palaces of fashionable East Egg glittered along the water.” (Fitzgerald, 2022: 12)One of the most important themes in the novel is class and social standing. It is a barrier for almost every character. East and West Egg acts as a symbol of this in its physical makeup.East Egg is the location where the rich people live in, who have family money and prestige, what would be called old money, meaning that the person or persons inherited the money from a previous generation live, therefore, the family has been wealthy for a long time. Their families have lived in the East for generations。 they feel proud of their traditional heritage. They have attended the finest private schools in the East and gained a particular kind of selfish sophistication. They move within their own narrow, snobbish social circle and feel superior to those who are not members of their privileged class. For example Daisy and Tom Buchanan live in East Egg because Tom’s family is old money. The dwellers in East Egg would be considered Easterners, cold, indifferent and not to be trusted.West Egg is the home of millionaires, also, but their money has not been inherited, and they haven’t had it very long. They have earned money quickly during the economic boom of the Roaring 20s, through legal and illegal means alike. The people of West Egg lack formal education and a traditional family heritage that goes back several generations。 they lack sophistication and flaunt their wealth, proud of how much money they possess. Gatsby is typical of West Eggers. He