After Midnight

1. If you are in the yellow variation, read the next hint. Otherwise, skip it.
2. You can't. You'll have to find the ghost costume instead.
3. The ghost haunts after midnight, when other people have gone to bed.
4. And it haunts only in the secret passages where people usually don't go. Read the next two hints only if you are in the red variation.
5. The ghost enters the castle on its way to the secret passages.
6. The ghost enters through the priest hole and goes backstairs.