What are examples of foreshadowing in Chapter 1 in Lord of The Flies?

Golding does a lot of foreshadowing in the first chapter. He uses a lot of dark and violent imagery to suggest trouble ahead. For example, there's the dark forest, the island w/ the coarse grass and decaying coconuts. When Ralph decides to go for a swim, the water's described as being warmer than their blood. When Ralph finds and makes sounds w/ the conch, he's described as getting a "violent pleasure" from doing so. There's a ton of this repeated dark, violent, sinister language throughout the first chapter. Take a peak at the link to see it more in-depth.