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- Cover the middle of the GIF and you go faster, cover the outside and you go slower.
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- Stare at the black dot, and the empty white space will begin to have color.
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- Stare at the dot and the gray bar suddenly becomes blue.
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- These are moving at the same speed.
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- If you watch the green dot, the yellow ones will begin to disappear.
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- Which direction is the train traveling?
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- Stare are the cross and you’ll begin to see green dots replace the empty spot.
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Read more at http://thechive.com/2015/03/27/gifs-that-are-brain-meltingly-awesome-17-gifs/#iSuJdIqZEFj6YLsL.99
