using System;
class Program
{
static void Main(string[] args)
{
Random r = new Random();
int size = r.Next(1, 5);
int r_size = (4 * size) + 1;
int mid = (r_size - 1)/2;
int x, y;
string[,] array = new string[r_size, r_size];
for ( y = 0; y < r_size; y++)
{
for ( x = 0; x < r_size; x++)
{
array[y, x] = "*";
}
}
int point_x = mid + 1;
int point_y = mid - 1;
int walk = 2;
x = mid + 1;
y = mid - 1;
while (x <= array.GetUpperBound(1) && y <= array.GetUpperBound(0))
{
for (x = point_x; x > point_x - walk; x--)
{
array[y, x] = " ";
}
point_x = x;
for (y = point_y; y < point_y + walk ; y++)
{
array[y, x] = " ";
}
point_y = y;
walk = walk + 2;
for (x = point_x; x < point_x + walk; x++)
{
array[y, x] = " ";
if (x >= array.GetUpperBound(1))
break;
}
if (x >=array.GetUpperBound(1))
{
if (y >= array.GetUpperBound(0) - 1)
break;
}
point_x = x;
for (y = point_y; y > point_y - walk; y--)
{
array[y, x] = " ";
}
point_y = y;
walk = walk + 2;
}
for ( y = 0; y < r_size; y++)
{
for ( x = 0; x < r_size; x++)
{
Console.Write(array[y, x] + " ");
}
Console.WriteLine();
}