Cant find any easter eggs Spartan Ops

I’ve been looking for the Easter eggs around the spartan ops missions, but there aren’t any of them, i have follow some tutorials but they just are missing, is there a solution for this?, i want that achievement.
Thank

Idon’t know, I wish I could help since I have the Roses Vs Violets achievenement, but I honestly don’t remember how to do it, I’m sorry.