#include "library.h"

void dp(const double size,
        const int sides,
        const int lefttodo)
{ if (lefttodo > 0)
  { draw_distance(size);
    turn_right_by_degrees(360.0/sides);
    dp(size, sides, lefttodo-1); } }

void draw_polygon(const double size,
                  const int sides)
{ dp(size, sides, sides); }

void main()
{ make_window(500, 500);
  move_to(100, 100);
  set_heading_degrees(90);
  draw_polygon(1, 360); }