public Walls(int mapWidth, int mapHight, char sym)
{
wallList = new List<Figure>();
HorizontalLine topLine = new HorizontalLine(0, mapWidth-2, 0, '+');
HorizontalLine bottomLine = new HorizontalLine(0, mapWidth-2, mapHight-1, '+');
VerticalLine leftLine = new VerticalLine(0, 0, mapHight-1, '+');
VerticalLine rightLine = new VerticalLine(mapWidth-1, 0, mapHight-2, '+');
wallList.Add(topLine);
wallList.Add(bottomLine);
wallList.Add(leftLine);
wallList.Add(rightLine);
}