using System;
using System.Timers;

namespace ConsoleApp2
{
    class Program
    {

        static void Main(string[] args)
        {
            //defining variables and references
            Random rnd = new Random();
            const string pool = "    0123456789!$%&~#";

            int width, height, timeinput;
            decimal time = 0;
            bool breakoff = false;

            Console.ForegroundColor = ConsoleColor.DarkGreen;

            //userinput
            Console.WriteLine("Enter Width: (in characters)");
            width = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Enter Height: (in characters)");
            height = Convert.ToInt32(Console.ReadLine());

            Console.WriteLine("Enter Runtime in min:");
            timeinput = Convert.ToInt32(Console.ReadLine());

            Console.Clear();

            //setting up array for matrix
            string[,] Zeile = new string[height, width];
            int[] Indexspeicher = new int[width];

            do //endless loop (timer, forcequit)
            {
                if (time%5 == 0)
                {
                    for (int indexgen = 0; indexgen < width; indexgen++)
                    {
                        Indexspeicher[indexgen] = rnd.Next(2);
                    }
                }

                //fill matrix with random chars
                for (int row = 0; row < height; row++)
                {
                    for (int chargen = 0; chargen < width; chargen++)
                    {
                        if(Indexspeicher[chargen] == 1)
                        {
                            var c = pool[rnd.Next(0, pool.Length)];
                            Zeile[row, chargen] = Convert.ToString(c);
                        }
                    }
                }

                //write matrix to string, less vsync
                int rowLength = Zeile.GetLength(0);
                int colLength = Zeile.GetLength(1);
                string output = "";
                for (int i = 0; i < rowLength; i++)
                {
                    if (i > 0)
                    {
                        output += "\n";
                    }
                    for (int j = 0; j < colLength; j++)
                    {
                        output += string.Format("{0} ", Zeile[i, j]);
                    }
                }

                //format and output
                Console.WriteLine(output);
                Console.Write(Environment.NewLine + Environment.NewLine);

                //forcequit
                if (Console.KeyAvailable)
                    if (Console.ReadKey().KeyChar == 'Q')
                        break;

                //timer
                System.Threading.Thread.Sleep(1000);
                Console.Clear();
                time += 1;
                if (time >= (timeinput * 60))
                {
                    breakoff = true;
                }

            } while (breakoff == false);
        }
    }
}