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Step 1: What You Need
What need is 2 buckets and 12 pieces of any block
Step 2: Building It
You will need to make a 3 long thing like in the picture
Step 3: Water
You need to put bucket of water on one side
Step 4: Water 2
Then add water to the other side
Step 5: Getting Water
Once your done only get water from the middle Of the thing and you got unlimited water