c.drawLine (100,100,200,100);
        c.drawLine (100,100,100,200);
        c.drawLine (200,100,200,200);
        c.drawLine (100,200,200,200);
        
        c.drawLine (100,100,150,50);
        c.drawLine (200,100,250,50);
        c.drawLine (150,50,250,50);
        
        c.drawLine (250,50,250,150);
        c.drawLine (250,150,200,200);
        
        c.drawLine (150,50,150,150);
        c.drawLine (150,150,250,150);
        c.drawLine (150,150,100,200);