public Walls(int mapWidth, int mapHeight)
{
wallList = new List <Figure>();
HorizontalLine topLine = new HorizontalLine(0, mapWidth - 2, 0, '*');
HorizontalLine bottomLine = new HorizontalLine(0, mapWidth - 2, mapHeight - 1, '*');
VerticalLine leftLine = new VerticalLine(0, mapHeight - 1, 0, '*');
VerticalLine rightLine = new VerticalLine(0, mapHeight - 1, mapWidth - 2, '*');
wallList.Add(topLine);
wallList.Add(bottomLine);
wallList.Add(leftLine);
wallList.Add(rightLine);
Random rnd = new Random();
int x = rnd.Next(1, mapWidth - 6);
int y = rnd.Next(1, mapHeight - 6);
HorizontalLine randomLine = new HorizontalLine(x, x + 3, y, '_');
wallList.Add(randomLine);
VerticalLine randomVertical = new VerticalLine(y + 5, y + 5, x - 6, '|');
wallList.Add(randomVertical);
}