Clock activated.
RED_CASTLE.
GREEN_CASTLE.
Stage_5:5[y]
Q
Maybe a mistake to look at this simply .. but Castle = Whitehouse.
https:// jfk14thday.com/secret-service-code-names-kennedy-white-house/
Red_Castle = comp'd
Green_Castle = We are go
Stage 5:5[y] = Stage Complete
Not sure about the y - yes? yankee? 25? Did think perhaps sum of someones initals? JP (John Podesta was my first thought but 26) … Just guessing ..