what foreshadows the pool scene?

I think the foreshadowing is mixed with irony surrounding Gatsby's pool is important. Throughout the novel, Gatsby's marble swimming pool represents his wealth, success, and dreams. However. The irony lies in that Gatsby himself does not enjoy the swimming pool and simply shows it off to Nick during a party. At the end of the novel, Gatsby instructs his servant not to drain the pool because he hasn't used it all summer: he only time he uses it is his last.