How does the author use foreshadowing in The Masque of the Red Death?

Poe uses foreshadowing to add suspense to his story. As the prince's party proceeds, the guests are too afraid to enter the seventh room. This room, which is located at the most western point, is covered in black velvet. The windowpane that looks into the room is blood red. This imagery reveals the gothic style of storytelling often used by Poe. An ebony clock in the seventh room causes the party to halt each time it chimes upon the hour, giving forth a horrific noise. The prince dies in this room when he meets the figure; his guests die when they rush into the room after hearing their host cry out. The intruder is then revealed here to be without form or substance.