Image imported from derpibooru 
Original Description:
 
this is just a test for something i plan for the future for my AU and i want to see if this makes a good flag
 
what do the colors and trees mean?
 
blue = space and otherworldly things
 
white = spirits  
tree = nature and the branches and roots are for the races living together and in harmony with the environment and space
 
vampires  
wolfponies  
immortals  
witches  
mummies  
swamp ponies  
ghosts
 
star is aquamarine = universe (what i read that this and another color represents that)
 
green = nature
 
there could be other meaning but i think is enough