new_contents: import matplotlib.pyplot as plt
  import openmc
  
  # Get the flux from the statepoint
  with openmc.StatePoint('statepoint.10.h5') as sp:
      flux = sp.tallies[1].mean
      flux.shape = (50, 50)
  
  # Plot the flux
  fig, ax = plt.subplots()
  ax.imshow(flux, origin='lower', extent=(-5.0, 5.0, -5.0, 5.0))
  ax.set_xlabel('x [cm]')
  ax.set_ylabel('y [cm]')
  plt.show()
  
subject: Add copy of existing show_flux.py