"...broke into boisturous play." The children of the village had just gotten out of school and are playing loudly outside, giving the sense of warmth and excitment.
"...stood together, away from the pile of stones in the corner, and their jokes were quiet and they smiled rather than laughed." We don't know why the stones are being gatherd yet, so it is mysterious that we see the men purposely avoid them. Their quiet jokes and smiles instead of laughs suggest that they are tense and trying to break the tension.
"It isn't fair, it isn't right," Mrs. Hutchinson screamed, and they were upon her." This whole scen is grave and horrific becuase we see that Tessie is getting stones, and is screaming with desperation and we can infer how horrified she is and how grave the situation is.
The town's black box represents the lottery and also death.
" The morning of June 27th was clear and sunny, with fresh warmth of a full-summer day: the flowers were blossoming profusley and the grass was richly green."
The black box is a metaphor for death and a long standing tradition, and the lottery is a metaphor for unfair rituals and an unenevitable death or doom.