In this scene with the villagers congregated around the box, the author creates a very anxious mood. This is done by showing the villagers acting jumpy and nervous, chitttering amongst themselves and being afraid of the papers they hold.
Thanks to the author's vivid description of Mr. Summers; I, as a creator, can depict him very consistently. She very clearly describes his outfit as a clean white shirt an blue jeans gives a vague description of his age as well.
Figure of Speech- Idiom
Old Man Warner is complaining about how somevillages are talking of giving up the lottery, and starts to make wild claims about how crazy the youth of their communities are. He says "Next they'll be wanting us to go back to living in caves" and obviously overexaggerated statement.
The lottery represets a dead tradition, carried out simply because it always has been. No one knows why they have the lottery, or who invented it, only that they have done it for as long as they could remember and that made it important. It is likely that the original purpose was as some form of ritual sacrifice or possibly as a form of population control, but at this point that's lost knowledge.
Old Man Warner quotes an old saying "Lottery in June, Corn Be heavy soon." Which could suggest that their "lottery" is actually the remnants of a reigional form of ritual sacrifice.