#include "library.h"

const double scale = 0.42;

void square(double x, double y, double size)
{ if (size <= 1)
    return;
  const double half = size/2;
  move_to(x-half, y-half);
  square(x-half, y-half, size*scale);
  draw_to(x+half, y-half);
  square(x+half, y-half, size*scale);
  draw_to(x+half, y+half);
  square(x+half, y+half, size*scale);
  draw_to(x-half, y+half);
  square(x-half, y+half, size*scale);
  draw_to(x-half, y-half);
  move_to(x, y); }

void main()
{ make_window(650, 650);
  set_pen_width(1);
  set_pen_color(color::red);