Candy Box 2 Lighthouse Puzzle Tutorial [Spoiler]

I am aware that this is probably not the most efficient way to do this, but it works.\r
SLOWER VIDEO HERE: \r
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Same explained in text here: \r
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Play the game here: \r
Follow me on Twitter: \r
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License attribution:\r
Ideas, game design & code by aniwey.\r
Ascii art by Tobias Nordqvist, GodsTurf, dixsept, Dani Deinol Gómez and aniwey.