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In this puzzle, when you click an arrow, all arrows immediately next to it (diagonally included), as well as the arrow you clicked itself rotate 90 degrees. The goal is to get all the of arrows to point in the same direction (say, upwards).

What's the name of, and solution to, this puzzle? I tried googling "arrow rotation puzzle", but that clearly isn't descriptive enough.

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    $\begingroup$ I would say it's a variation of the "lights off" game, but I don't know if this particular version with the arrows has a specific name $\endgroup$
    – melfnt
    Mar 19, 2021 at 18:33
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    $\begingroup$ Yeah this is "lights out" but with integers modulo 4 instead of modulo 2. $\endgroup$
    – hugo
    Mar 20, 2021 at 18:55
  • $\begingroup$ ...or lights out with two layers, you can only toggle lights on the top layer, and every light on the bottom layer gets toggled when the one above it gets turned off x) $\endgroup$
    – hugo
    Mar 20, 2021 at 19:00

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