The Republic of Korea (or, "South Korea") has a Taegeuk at the centre (essentially, a blue and red yin and yang symbol). This design is derived from the flag of the Korean Empire (used between 1882 and 1910), shown by the following two images:
I know how to produce a regular 'yin-yang' symbol (a circle with two circles with diameters half as long), but I don't know how to make this spiral variant myself. Is there a way to do this, so that the lobes are equal in area and shape, and they tessellate to form a perfect circle? I'm using Adobe Illustrator, so answers applicable to this appreciated.