using System;

public class Program

{

    public static void Main()

    {

        int h = 14;

        int w = 28;

        int cx = 0; //currentx

        int cy = 0; //currenty

        int dir = 0;

        bool firsttimew = true;

        while (h >= 2)

        {

            if((dir % 4) == 0) // going right

            {

                for (int i = 0; i < w; i++)

                {

                    Console.WriteLine(cx + ", " + cy);

                    cx += 1;

                }

                if (firsttimew == true)

                {

                    firsttimew = false;

                    w -= 1;

                } else

                {

                    w -= 2;

                }

                //create waypoint

                //change direction

                dir += 1;

            } else if ((dir % 4) == 1) //going down

            {

                cy -= 1;

                for (int i = 0; i < h; i++)

                {

                    Console.WriteLine(cx + ", " + cy);

                    cy -= 1;

                }

                h -= 2;

                //create waypoint

                dir += 1;

            } else if ((dir % 4) == 3) //going left

            {

                cx -= 1;

                for (int i = 0; i < w; i++)

                {

                    Console.WriteLine(cx + ", " + cy);

                    cx -= 1;

                }

                w -= 2;

                //create waypoint

                dir += 1;

            } else if ((dir % 4) == 3)

            {

                cy += 1;

                for (int i = 0; i < h; i++)

                {

                    Console.WriteLine(cx + ", " + cy);

                    cy += 1;

                }

                h -= 2;

                //create waypoint

                dir += 1;

            }

        }

​

    }

}