FallenInLoveLiveDemo

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FallenInLoveLiveDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            Console.BackgroundColor = ConsoleColor.Black;
            Console.Clear();

            int height = 3 * n + 1;

            int width = 4 * n + 6;
            int magicVariable = 0;
            for(int row = 0; row < n; row++)
            {
                string line = "#" + new string('~' , row) + "#" + new string('.' , ( 2 * n ) - magicVariable) + "#" +
                              new string('.' , magicVariable) + "#" + new string('.' , ( 2 * n ) - magicVariable) + "#" +
                              new string('~' , row) + "#";
                magicVariable += 2;
                Console.ForegroundColor = ConsoleColor.White;
                Console.WriteLine(line);
            }

            int outerDots = 0;

            for(int row = 0; row <= n; row++)
            {
                string line = "." + new String('.' , outerDots) + "#" + new String('~' , n - row) + "#" + new string('.' , ( 2 * n ) - outerDots) + "#" + new String('~' , n - row) + "#" + new String('.' , outerDots) + ".";
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine(line);
                outerDots += 2;
            }

            for(int row = 0; row < n; row++)
            {
                //string line = StringCreator(".", (width - 2) / 2) + "##" + StringCreator(".", (width - 2) / 2);
                string line = new string('.' , ( width - 2 ) / 2) + "##" + new string('.' , ( width - 2 ) / 2);
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine(line);
            }
        }

            /* Uncomment when using !!!*/
        //public static string StringCreator(String text, int repeat)
        //{
        //    StringBuilder sb = new StringBuilder();
        //    for (int i = 0; i < repeat; i++)
        //    {
        //        sb.Append(text);
        //    }
        //    return sb.ToString();
        //}
    }
}