The Empty Disc Illusion

 

 It all began in 2021 with a spinning laser pointer that I aimed at the back of a book.

 Three years later, after more than 1001 days and nights, I directed the same device inside an empty cardboard box, resulting in an inverted heart shape ♠️. I felt disappointed because it wasn't the heart shape I needed for my project.

Days later, when the laser pointer had broken, I pondered why the cardboard's surface had inverted the pattern. My theory was that the direction of the heart shape depended on the angle of the surface where the light formed the shape. I began

 experimenting with drawing using only shadows.

https://youtube.com/shorts/ADrfRFJIXOU?feature=share

Then the ring landed on the sheet of the paper to become like this.

https://youtube.com/shorts/argIF0B7IfY?feature=share

My personal point of view about it is explained here

https://youtube.com/shorts/4nFbZUSIezE?feature=share

And to watch it happening, you must open it

https://youtu.be/MKI0pm4ZaXA

Here you can also install Crossword

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