Central Image: Use a striking and creepy central image of the girl in the yellow dress. Ensure the image is clear and high quality. A close-up of her face with a scared or menacing expression can be very effective.

Background: Choose a dark or ominous background that contrasts with the yellow dress to make it stand out. An eerie setting like an abandoned house, a dark forest, or a dimly lit room can enhance the horror theme.

Title Text: Include the title text on the thumbnail. Use bold, spooky fonts with contrasting colors (e.g., red or white) to make the text stand out against the background. Position the text so it doesn't obscure the central image but is still easily readable.

Visual Effects: Add some subtle horror effects, like shadows, fog, or light flares, to enhance the spooky atmosphere. Be careful not to overdo it, as it should still be clear what the central image is.

Expression and Pose: If possible, use an image where the girl's expression and pose convey fear or eerine