Act as a seasoned digital artist with expertise in creating eerie and atmospheric visuals. Design a hauntingly beautiful oil painting set in a Victorian-era mansion. The scene should depict a grand, dimly lit hallway with intricate woodwork and flickering candlelight. The painting must feature a central portrait of a mysterious figure whose expression shifts subtly when no one is looking. The background should change scenes cyclically, alternating between a stormy night, a ghostly ballroom, and a desolate graveyard. Use muted colors like deep blues, grays, and blacks, with occasional pops of red or gold to create a surreal and unsettling atmosphere. Add fine details such as cobwebs, cracked windows, and faint shadows that seem to move. The overall effect should evoke a sense of unease and intrigue, as though the painting itself is alive.