---

private void Form1_Paint(object sender, PaintEventArgs e)
{
    Graphics g = e.Graphics;
    Pen pen = new Pen(Color.Black, 2);

    int scale = 20;
    int offsetX = 100;
    int offsetY = 400;

    Point P(int x, int y) => new Point(offsetX + x * scale, offsetY - y * scale);

    g.DrawLine(pen, P(5, 18), P(4, 13));
    g.DrawLine(pen, P(5, 18), P(6, 13));
    g.DrawLine(pen, P(4, 13), P(4, 3));
    g.DrawLine(pen, P(6, 13), P(6, 3));
    g.DrawLine(pen, P(4, 3), P(6, 3));

    Point[] leftFin = { P(4, 8), P(2, 5), P(2, 1), P(3, 1), P(4, 3) };
    g.DrawLines(pen, leftFin);

    Point[] rightFin = { P(6, 8), P(8, 5), P(8, 1), P(7, 1), P(6, 3) };
    g.DrawLines(pen, rightFin);

    int r = scale / 2;
    g.DrawEllipse(pen, offsetX + 5 * scale - r, offsetY - 12 * scale - r, 2 * r, 2 * r);
    g.DrawEllipse(pen, offsetX + 5 * scale - r, offsetY - 10 * scale - r, 2 * r, 2 * r);
}