prepareing a piece of square paper,then to fold the opposite angle .We can get the shape which we want if we fold it according to the crease.Folding an angle,and remember to turn over the center line .Folding the other three angles in the same way.Folding the bottom,then you can get a crease.Unfolding the bottom,and open the lateral angles .Then you need turn back the angles which you have opened.At last,opening the mouth of waste-paper basket ,and put it in order .It'll be better if you trim its edge .If you attach the double faced adhesive tape on the turning,it'll be firmer.
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