some cool stuff:
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https://www.youtube.com/watch?v=muO9zOlriZ8
https://www.youtube.com/watch?v=azYWe2LNt8Q
https://www.youtube.com/watch?v=2jS9rr3CJWw
https://www.youtube.com/watch?v=g1qPndoQH8U
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the machine