Spontaneous: Describing a system that seemingly came from nowhere. Covers many endogenic-umbrella origins, like protogenic and some forms of neurogenic.
The colors in this flag were chosen due to their association with nature, and the fact that plants can just seem to spring from nothing and nowhere.
A 6 striped flag, with all stripes appearing at a 45 degree angle across the image. From the top left to the center is a dark-light gradient of shades of green. From the bottom right to the center is a similar gradient of brown. Between them is a strip of white (or transparency)