Base Folds

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Step 1. Start with a piece of paper white side up. Then fold the paper in half diagonally both ways, and unfold.
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Step 2. Fold the paper in half vertically and horizontally, then unfold.
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Step. 3 Using existing creases, fold the paper in half and
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Step 4. Collapse in progress.
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Step 5.Finished Preliminary base!
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Step 1. Start with a piece of paper white side up. Then fold the paper in half diagonally, then vertically and horizontally. unfold.
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Step 2. Holding the bottom tip down, fold the remaining three to the center, performing a collapse.
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Step 3. Collapse in progress.
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Step 4. End of collapse.
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Step 5. Fold the sides to the center, making sure that the sides you fold, have the four tips at the bottom.
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Step 6. Unfold the sides you just folded, and pull them up to the top. Make sure you don’t tear the paper.
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Finished preliminary base! Repeat steps 5-6 on the back to continue for the crane.