Using Thread example

You can refer to the time calculation example below for thread

using System;
using System.Globalization;
using System.Text;
using GettingStarted;

class Program
{

    static void Main(string[] args)
    {
        CircularLinkedList<string> categories = new CircularLinkedList<string>();
            categories.AddLast("Sport");
            categories.AddLast("Culture");
            categories.AddLast("History");
            categories.AddLast("Geography");
            categories.AddLast("People");
            categories.AddLast("Technology");
            categories.AddLast("Nature");
            categories.AddLast("Science");

            Random random = new Random();
            int totalTime = 0;
            int remainingTime = 0;
            foreach (string category in categories)
            {
                if (remainingTime <= 0)
                {
                    Console.WriteLine("Press [Enter] to start or any other to exit.");
                    switch (Console.ReadKey().Key)
                    {
                        case ConsoleKey.Enter:
                            totalTime = random.Next(1000, 5000);
                            remainingTime = totalTime;
                            break;
                        default:
                            return;
                    }
                }

                int categoryTime = (-450 * remainingTime) / (totalTime - 50) + 500 + (22500 / (totalTime - 50));
                remainingTime -= categoryTime;
                
                Thread.Sleep(categoryTime);

                Console.ForegroundColor = remainingTime <= 0 ? ConsoleColor.Red : ConsoleColor.Gray;
                Console.WriteLine(category);
                Console.ForegroundColor = ConsoleColor.Gray;
            }
    }
        
        
}