Fitzgerald uses white to represent purity and innocence and the figures of speech give the passage a light mood along with the image of floating girls.

<h3>Analyzing the passage from "The Great Gatsby"</h3>

We can develop the answer and analyze the passage as follows:

Fitzgerald uses color to represent different feelings. In the passage, he uses white to convey a sense of purity and innocence, as if the narrator is entering heaven.
He uses simile in "like pale flags" and metaphor in "the frosted-cake of the ceiling." "The whip and snap of the curtains" is an onomatopoeia, representing sound. Such figures of speech give the passage a light and vivacious mood.
One image that is quite appealing is that of the girls being balloons, floating around the house and then slowly coming back to the floor. This image conveys a sense of joy and wonder, as if there is something magical about those girls.
A sound that would fit the situation is "whoosh" because of the wind coming in through the windows and moving everything around the room.