using System;

var height = 17 - 2;

var width = 14 - 1;

var blocks = 0;

var size = 1;

var startX = 0;

Console.WriteLine($" {new string('-', width)} ");

for (var y = 0; y < height; y++)

{

    var isDone = false;

    Console.Write('|');

    for (var x = 0; x < width; x++)

    {

        if (!isDone

            && (blocks == 0 && x == startX

            || blocks > 0))

        {

            Console.Write('!');

            blocks = blocks == 0 ? size - 1 : blocks - 1;

            if (blocks == 0)

            {

                startX = (x + 1) % width;

                size++;

                isDone = true;

            }

        }

        else

        {

            Console.Write(' ');

        }

    }

    Console.Write('|');

    Console.WriteLine();

}

Console.WriteLine($" {new string('-', width)} ");