How does the author use foreshadowing in The Story of the Stone, or The Dream of the Red Chamber; Volume 1: The Golden Days?

When the children write riddles for Grandmother Jia's riddle party, Jia Zhen is surprised that children so young could come up with such dark and foreboding riddles. He sees the tone of these riddles as a form of foreshadowing. The children are foretelling their own short and ill-fated lives.