#include "library.h"

double draw_fancy_line(const double side)
{ if (side <= 1)
  { draw_distance(side);
    return side; }
  else
  { const double len1 = draw_fancy_line(side/3);
    turn_left_by_degrees(60);
    const double len2 = draw_fancy_line(side/3);
    turn_right_by_degrees(120);
    const double len3 = draw_fancy_line(side/3);
    turn_left_by_degrees(60);
    const double len4 = draw_fancy_line(side/3);
    return len1 + len2 + len3 + len4; } }

double draw_triangle(const double side)
{ const double len1 = draw_fancy_line(side);
  turn_right_by_degrees(120);
  const double len2 = draw_fancy_line(side);
  turn_right_by_degrees(120);
  const double len3 = draw_fancy_line(side);
  turn_right_by_degrees(120);
  return len1 + len2 + len3; }

void main()
{ make_window(700, 700);
  move_to(200, 500);
  set_pen_width(1);
  set_pen_color(color::red);
  const double perim = draw_triangle(3000);
  cout << "The perimeter is " << perim << "\n"; }