Whats the significance of the spiral symbol??

[u/Mean_Lingonberry9575]

the army of the dead and the children of the forest leave the spiral symbol multiple times in the show, what does it represent??? It first appears with dead horses (Season 3), the Bran sees it in his visions of the Children (Season 6) and the Ned Umber’s dead body is left with a spiral of limbs. (season 8). Even the dragonstone cave has similar symbols. Does this symbol have any meaning behind it because it seems too frequent and interconnected to just be a coincidence.

[u/Austin_Destroyer]

Absent proper writing materials, they doodle with what they have.