The document appears to be a series of optical illusions and visual perception tests presented as questions in both English and Indonesian. It asks the reader questions about images that may or may not be present and tests whether the reader sees different interpretations of ambiguous images, counts elements in the images, and perceives visual effects after staring at certain areas of the text. The questions are designed to challenge the reader's visual perception and see how their brain interprets ambiguous or illusory information.
10. Stare at the black lightbulb for at least 30 seconds.
Then immediately stare at a white area on the screen
or at a sheet of paper. You should see a glowing light bulb!