public void AddOne(Snake snake, Food food)
{
Position obstacle = new Position();
do
{
obstacle = new Position(randomNumbersGenerator.Next(0, Console.WindowHeight), randomNumbersGenerator.Next(0, Console.WindowWidth));
}while (snake.Contains(obstacle) || obstacles.Contains(obstacle) || food.Position.Equals(obstacle));
obstacles.Add(obstacle);
// show
Console.SetCursorPosition(obstacle.col, obstacle.row);
Console.ForegroundColor = ConsoleColor.Green;
Console.Write("=");
}
