How are the rhythms of life on the island different from what the other boys are used to?

In chapter four of Lord of the Flies, "Painted Faces and Long Hair," Golding provides a great deal of detail about the rhythm of the island that has become a way of life for the boys, indicating that they have been living on the island for a significant amount of time. The boys have managed to adjust to life on the island, as is demonstrated be the line, "the northern European tradition of work, play, and food right through the day, made it possible for them to adjust themselves wholly to this new rhythm." However, while the boys are adjusting to this life, the rhythm of the island comes with many struggles. The midday heat and sun caused a great deal of struggle for the boys because it would create mirages out on the water, causing the boys to question what they were seeing. The sunset and beginning of night created another set of difficulties for the boys, as they were restless and had a great deal of trouble getting any significant sleep. Fears of what was beyond the huts created a climate that made it impossible for the boys to truly rest.
The life of the island was a particular struggle for the groups of youngest boys generally referred to as "littluns." This group of littluns is the youngest of the boys on the island, and they are often left to fend for themselves on the island while the bigger boys focus on what they believe to be more pressing issues. The littluns struggle with physical issues of diarrhea, and emotional issues of fear on the island. The lack of adults on the island means that these young boys do not have anyone to comfort them and assuage their fears in the night. While they learn to rely on each other, it is still a difficult adjustment for the boys on the island.