mendosi

Gloryspren? Tiny golden translucent globes of light... http://stormlightarchive.wikia.com/wiki/Spren_Types

Note also that the location of the green, purple and blue dots with respect to each other and the centre seems to align with the inferred orbits of each of the three moons:

I note that the design behind Vedel also includes glyphs of the ten orders, and in the centre seems to have a representation of the three moons of Roshar. Of what significance are the moons? I never heard them associated with heralds or surge binding before.