|  | How to make a four-leaf origami clover with a flat base (St Patrick's Day Origami)(page 10) |  | 
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 | 17. Apply the "balloon-fold" of the step #16. 
 Prepare to rotate the origami clover model by 90 degrees. | 
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 | 18. Rotate the origami clover model by 90 degrees. 
 Prepare to apply a "balloon-fold" on the 4th side. |