code: def ready_to_draw(mol):
      
      copied = molutil.clone(mol)
      # display_terminal_carbon(mol)
      equalize_terminal_double_bond(copied)
      # spine_to_terminal_wedge(copied)
      scale_and_center(copied)
      format_ring_double_bond(copied)
      return copied
docs: Shortcut function to prepare molecule to draw.
      Overwrite this function for customized appearance.
      It is recommended to clone the molecule before draw
      because all the methods above are destructive.