Optical illusion: A girl in inverted colors

This is not a sudoku puzzle. It’s an optical illusion. I think it’s nice to take a break every once in a while and do something different. So… in this optical illusion we have an image of a girl with inverted colors (a “negative” image).

What you need to do to make this optical illusion work is:
1. Stare at the red dot on her nose for 30 seconds.
2. Immediately look at a white wall and start blinking.

What happens? What do you see?

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