The flag is separated into two colors, yellow and blue. The yellow half is on the top, and the blue hald on the bottom. At the center of the map there is a symbol that represents various things. The devision between the two primary colors is a red line.
The symbol at the center of the flag represents Yo, and YW. The symbol contains all four of those letters hidden in it. Yo, for the beginning of YoWorld, and YW, as an abbreviation for YoWorld.