Later, it’s the ruby slippers on Dorothy’s feet that become the code to open the door to Oz. When the guard initially refuses entrance, the Scarecrow asserts, “She’s wearing the ruby slippers [Glinda] gave her”. The guard replies, Oh…so she is!

Well, bust my buttons! Why didn’t you say that in the first place?” Our four protagonists are immediately granted entrance (Screenplays for you, 2014).