the lottery \How does Jackson start to foreshadow the ending in paragraphs 2 and 3?

Paragraph Two

Bobby Martin had already stuffed his pockets full of stones, and the other boys soon followed his example, selecting the smoothest and roundest stones; Bobby and Harry Jones and Dickie Delacroix-- the villagers pronounced this name "Dellacroy"--eventually made a great pile of stones in one corner of the square and guarded it against the raids of the other boys.

Paragraph Three

They stood together, away from the pile of stones in the corner, and their jokes were quiet and they smiled rather than laughed.

Bobby Martin ducked under his mother's grasping hand and ran, laughing, back to the pile of stones. His father spoke up sharply, and Bobby came quickly and took his place between his father and his oldest brother.