Persistence of Vision Test

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Persistence of Vision Test was a flash screamer game that was created and hosted on the Badgerville site in 2005, but the website is no longer active.

The viewer is prompted via audio instructions to stare into a small black dot at the center of a white background. During this time, instructions such as "Continue concentrating on the dot" appear. Two black lines appear above and below the dot, and the game asks the player to concentrate on these as well, However, within the next 30 seconds, a picture of a human skull will eventually pop up and cover the dot with a loud scream.

Link
NOTE : The following game contains a screamer!
 * web.archive.org/web/20051027014520/vision.badgerville.org/