Pyro system: A system that either started out small and gained members quickly, became large at one time and now has many dormant members, has many members that fluctuate in and out of dormancy often, or never has a stable amount of members
(Definition taken from here)
The colors are taken directly from the pyro system flag created by gendernovus/genderstalgia on tumblr
A 5 striped flag, with all the stripes vertical. The leftmost and rightmost stripes are red, with the large center stripe being a light orange. Between them are thin white stripes (or transparency, for the transparent version)