private static void DrawTriangle(Graphics graphics, Brush brush, int x, int y, bool pointLeft)
{
Point[] trianglePoints = new[]
{
new Point(x, y),
new Point(x + ((LeftBorder / 2) * (pointLeft ? 1 : -1)), y - (LeftBorder / 2)),
new Point(x + ((LeftBorder / 2) * (pointLeft ? 1 : -1)), y + (LeftBorder / 2)),
};
graphics.FillPolygon(brush, trianglePoints);
}