Put the pigs head on it, as a gift to the "beast" so it doesn't kill them
Well, they use the first sharpened stick to put the pig's head on. They don't actually do anything with the second stick, but they planned to kill Ralph and stick him on there, just like the Lord of the Flies. Luckily for him, the naval officer came and the suspenseful chase through the woods is ended.
Technology can be as simple as a sharpened stick.
They warn Ralph that Jack plans to hunt him the next day and that Roger has "sharpened a stick at both ends."
Roger and Jack likely intended to use the sharpened stick as a weapon. Its design as a spear with both ends sharpened suggests they intended to hunt or harm someone or something. This weapon could have been used for hunting animals or as a tool to establish power or control over others.
Roger has prepared a stick sharpened at both ends for Ralph. This means that he has the same end in mind for Ralph as the sow (female pig). The sow was killed rather brutally killed prior to having her decapitated head mounted on a stick sharpened at both ends as an offering to "the Beast." This is a thinly vailed threat on Roger's part.
In "Lord of the Flies" by William Golding, the sharpened stick that Jack holds is described as about five feet long. It is used as a weapon by Jack and his hunters against Ralph and Piggy.
Well, they use the first sharpened stick to put the pig's head on. They don't actually do anything with the second stick, but they planned to kill Ralph and stick him on there, just like the Lord of the Flies. Luckily for him, the naval officer came and the suspenseful chase through the woods is ended.
-Spoiler warning- The only other time a stick is sharpened at both ends is after Jack killes the sow and offers the head to the beast for protection. It means that Roger wants to murder Ralph, cut his throat, and put his disembodied head on the stick as an offering to Satan.
Samneric tells Ralph that Roger sharpened a stick at both ends. This means that when they kill him, they will put him on the stick like the pig's head.
sharpened
After killing the sow, Jack and his boys leave the sow's head on a sharpened stick in the jungle.
When Samneric mention that Roger sharpened a stick at both ends in "Lord of the Flies," it signifies the increasingly violent and dangerous nature of Roger. Sharpening a stick at both ends suggests a malicious intent to harm others, foreshadowing the savagery that will eventually consume the boys on the island. It also symbolizes the loss of civilization and the descent into barbarism.