Spacities #23

A magic dust builds skyscrapers in outer space.
Some sort of life can be seen among the buildings.
Only a few lucky viewers can observe two planets from the same window.

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Press:
's' to save a 4000x4000 .png at any moment
'p' to pause and unpause animation
'+' and '-' to change the magic speed
(changing the magic speed will change the final output)
(it's possible to have negative speed)

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