code: def contour(c, subsample=1, size=10, color='g'):
          
          if not isinstance(c, Contour):
              raise ValueError('Input must be of type Contour')
              
          for i in range(c.num_pixels)[0::subsample]:
              plt.scatter(c.boundary_pixels[i,1], c.boundary_pixels[i,0], s=size, c=color)
docs: Draws a contour on the current plot by scattering points.
  
          Parameters
          ----------
          c : :obj:`autolab_core.Contour`
              contour to draw
          subsample : int
              subsample rate for boundary pixels
          size : int
              size of scattered points
          color : :obj:`str`
              color of box