if u studied the great gatsby pls help!

I'm just bullet pointing ideas, so don't come for my incomplete clauses.

Maybe Gatsby's house? How it is described as an "imitation" - links to how even he, a self-made man, will only ever be an "oxford man in a pink suit".... The American Dream is not achievable.
Gatsby's tragic arc and his fall from elevation - not even those who appear to have achieved the dream are safe.
The green light as a symbol of Gatsby's yearning for the American dream. His strong sense of purpose and determination to achieve the dream and, in consequence, Daisy. Perhaps, Daisy becomes a symbol of the American dream for Gatsby - the lines between Love and Ambition blur.