A fractal, also known as the Koch snowflake, which was first described by Helge von Koch in 1904. It is built by starting with an equilateral triangle, removing the inner third of each side, building another equilateral triangle at the location where the side was removed, and then repeating the process indefinitely. The Koch snowflake can be simply encoded as a Lindenmayer system with initial string “F—F—F”, string rewriting rule “F” -> “F+F—F+F”, and angle .