The black and red room symbolizes the last stage of life, inevitable death.
It is the Red Death - having found the Count and all his guests despite his efforts to avoid him.
the black plague, probably.
The clock in the "Masque of the Red Death" symbolizes the final judgement. When everyones life comes to an end, the clock stops. The clock indicates it is time to use your brain and come up with your...
The red windows in the black room cause people to appear to have the disease, as the Black Plague caused you to have red sores.