void CanvasArea(Tree2D listpoint)
    {

        line = new Line();

        int pka = new Random().nextInt(600);
        int pkb = new Random().nextInt(600);

        Point pompkt = new Point(pka,pkb);
        int a = new Random().nextInt(3);
        if(a == 0)
        {
            line.setStartX(0);
            int b = new Random().nextInt(301);
            lineMy = new LineMy(0,b,600,b + 299);
            line.setStartY(b);
            line.setEndX(600);
            line.setEndY(b + 299);
            lineMy.whichSide(lineMy,pompkt);

        }
        if(a == 1)
        {
            line.setStartX(600);
            int b = new Random().nextInt(301);
            lineMy = new LineMy(600,b,0,b + 299);
            line.setStartY(b);
            line.setEndX(0);
            line.setEndY(b + 299);
            lineMy.whichSide(lineMy,pompkt);
        }
        if(a == 2)
        {

            line.setStartY(0);
            int b = new Random().nextInt(301);
            lineMy = new LineMy(b,0,b+299,600);
            line.setStartX(b);
            line.setEndX(b+299);
            line.setEndY(600);
            lineMy.whichSide(lineMy,pompkt);

        }