using System;

​

namespace Rextester

{

    public class Program

    {

        public static void Main(string[] args)

        {

            System.Random Pepe = new System.Random();

            // Put this hold thing into a function

            int roadposx = 5;

            int position = 1;

            int width = 20;

            int v = 1;

            for (int i = 0; i < 1000; i++)

            {

                for (int j = 0; j < roadposx; j++)

                {

                    Console.Write(" ");

                }

​

                int a = Pepe.Next(-1, 2);

                roadposx = roadposx + a;

                if (roadposx < 0)

                    roadposx = 0;

                Console.Write("#");

                for (int t = 0; t < position; t++)

                {

                    Console.Write(" ");

                }

​

                Console.Write("@");

                for (int b = 0; b < width - position - 1; b++)

                {

                    Console.Write(" ");

                }

​

                position = position + v;

                if (position > width-1-1)

                {

                    v = -v;

                }

​

                if (position < 1)

                {

                    v = -v;

                }

​

                Console.Write("#");

                Console.WriteLine();

            }

        }

    }

}