From the moment Squid Game drops its first masked soldier onto the screen, the symbols on their faces demand attention.

a symbol used during the Holocaust to identify gay men in Nazi concentration camps. The triangle was overlaid with a red circle and a line through it, suggesting “gays not allowed.” ...

But many people would not be able to tell you what the triangle symbol on a clothes label means ... represents 'do not dry', and a square with a circle in the middle (so that it looks like ...