STORY
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you have captured you worst enemy in a glass bottle and you made an over complicated machine to kill him with sand.
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RESET
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first, destroy all remaining minecarts before anything.

second, place minecarts on the powered rails where the glass is.

third, destroy the sand in the bottle and pile 6 sand in front of the piston.

then your good to press the button and watch again!
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made by rerun04