The four "Gye" (bar designs), in the corners of the flag, are based on the Um and Yang principle of light and darkness. The location of these Gye represent the four points of the compass. Ee-Gye in the lower left corner, indicates dawn and early sunlight as the sun rises in the east. Kung-Gye, in the upper left, represents bright sunshine when the sun is in the south. Kam-Gye in the upper right corner symbolizes twilight as the sun moves to the west. Kon-Gye in the lower right, indicates total darkness when the sun is in the north. Together these symbols express the mysteries of the universe.