One day before the Nyepi day is called Pengrupukan day Family member will walking around their compound bringing fire torch and make a lot of noise by kulkul (traditional bamboo bell). Pengerupukan is a ritual ceremony one day before silent day. Pengerupukan purpose ward off demons which symbolized by parading ogoh-ogoh around the village at the night.
This ritual banishes negativity and evil from the island and its inhabitants. According to Hindu beliefs, it is the responsibility of humans to maintain the balance between the gods, Earth, and humans.
For this ritual, Balinese people create large statues of demons and other evil creatures out of bamboo and paper. These statues are known as ogoh-ogoh. Many of the ogoh-ogoh seen in parades are created by youth groups from Balinese villages. The most impressive ogoh-ogoh are usually created by Balinese artists.
After the ogoh-ogoh are created, they are taken to a large street parade for everyone to see. It is believed that the ogoh-ogoh will absorb the negative energy of the spectators and ward off evil spirits. After the parade, the ogoh-ogoh are burned in a large public bonfire. In addition to warding off evil and purifying the Balinese people, the bonfire is also believed to satisfy Batara Kala, the god of the underworld.
For village level, villagers will also held a procession with the fire torch and kulkul. Since 1980 this procession also include procession of Ogoh-Ogoh, a giant monster doll, in the form of demon characters as symbol of evil (bhuta). The doll mainly made of bamboo and cement sacks. Before the procession, a ceremony is perform to invite spirits occupy the Ogoh-Ogoh and after the procession another ceremony is held to neutralize the spirits by symbolically burn or actually burn the Ogoh-ogoh.
This spirit is believed as spirit of evil (bhuta) that may become the disturbance for human and the universe and they will be always part of human and universe. The purpose of the overall ceremony that held on this day are to neutralize the bad force / spirit (bhuta) so it is not any longer becomes disturbance but instead become positive force for the good of human and universe.