Here is how to make
fold line folding
(1) Fold a square piece of paper in half
along AB. Snowflake Examples
(2)(3)Crease lines CD, CE, and CF and
the paper into 3 equal sections.
(4)(5)Use CD as the center line and fold
paper in half again. CF should be on top of CBE.
(6)Cut along BD and make sure that CD
CB are the same length.
(7)Use the wedge-shaped paper to cut out
Source of information: How to Make A Paper Snowflake by