In Sasanian period the festival was divided into two distinct pentads, known as the lesser and the greater Pentad, or Panji as it is called today. Gradually the belief developed that the 'Lesser Panji' belonged to the souls of children and those who died without sin, whereas 'Greater Panji' was truly for all souls. Spring housecleaning was carried out and bon fires were set up on the rooftops to welcome the return of the departed souls. Small clay figurines in shape of humans and animals symbolizing all departed relatives and animals were also placed on the rooftops.
