A modificaction of the first five iterations of the Koch's (c) by changing parameter angle from 60º to 90º.      
  Part of: Briz-Redón Á, Serrano-Aroca Á (2018) Novel pedagogical tool for simultaneous learning of plane geometry and R programming. Research Ideas and Outcomes 4: e25485. https://doi.org/10.3897/rio.4.e25485