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 This page is for those who want the instructions to make a square-base in origami.A square-base can be made by applying two valley-folds and one horizontal mountain-fold to a square paper. The instruction is shown below. Just click on "Ascend" button. You will be given a step-by-step guide how to apply a fold. If you miss a step, then just click on "Descend" button to go back to the previous step. If the screen is blank, just wait until it shows a message saying "Are you ready to get started?". If you find any bugs on this instruction, please send an email to.If you are ready now, let's have a fun learning to make a square-base in origami.

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 Square base is one of two important simple base in origami. Equally important base is Balloon base. The relationship between Square base and Balloon base is like one between valley-fold and mountain-fold.
 You can start with any kind paper with a square size. Here the back side of the paper is shown.
 This is the front side of paper.   It is somewhat shinier compare to the back side.

 The crease pattern (CP) for square base is shown on the left.   The order of folding is (1) two valley-folds followed by (2) two mountain-folds.   The following steps #1 through #8 explain these folding in detail.

 1. Let's start with a paper's front side facing up.   Prepare for a valley-fold along a diagonal line.

 2. Apply the valley-fold of the step #1.

 3. Prepare for a valley-fold along another diagonal line.

 4. Valley-fold along the diagonal line.

 5. Prepare to mountain-fold along the middle horizontal line.

 6. Apply the mountain-fold of the step #5.

 7. Prepare to mountain-fold along the middle vertical line.

 8. Mountain-fold along the middle vertical line.   Prepare to grab two arrow points with two fingers.   Since there are four arrows, you need to use two hands.

 9. Grab two edges with fingers.   Prepare to squeeze the model.

 10. Squeeze the model.

 11. Prepare to move two fingers following the arrow directions.

 12. Make the model to be flat.   Prepare to rotate the model vertically by 90 degrees.

 13. Rotate the model vertically by 90 degrees.

 14. Square base is now completed.

# Relationship between square base and balloon base

 15. Let's try to find out the relationship between square base and ballon base.   Open the square base from the step #14.

 16. Turn the paper over.

 17. Grab opposite edges.

 18. Twist your fingers so that the center gets pop-up.

 19. Prepare to make the model flat.

 20. Flatten the model.

 21. Balloon base is completed.   But remember that the surface of the balloon base is the back side of the paper.   This means that there is one-to-one correspondence between back-side balloon base with front-side square base.   If you make a back-side square base, then it can be converted to a front-side balloon base.