add def blank

        s = self.stat
        g = self.canon
        if g is None: return
        x,y,z,p = 0,1,2,3
        view = self.get_view()
        ###########################################################################################################
        self.color_limit(0)
        glColor3f(*self.colors['axis_z'])
        glBegin(GL_LINES)
        if view == z :

            glVertex3f(-10, -10, 0)
            glVertex3f(10, -10, 0)
            
            glVertex3f(10, -10, 0)
            glVertex3f(10, 5, 0)
            
            glVertex3f(10, 5, 0)
            glVertex3f(-10, 5, 0)
            
            glVertex3f(-10, 5, 0)
            glVertex3f(-10, -10, 0)
        glEnd()