moon.py

class Moon(object):
  """Graphical moon object"""
  
  PHASES = ('new', 'waxing-crescent', 'first-quarter', 'waxing-gibbous',
            'full', 'waning-gibbous', 'third-quarter', 'waning-crescent')
  
  def __init__(self, x, y):
    """Creates a new moon at the coordinates"""
    self._x, self._y = x, y
    
  def animate_phases(self):
    """Animates the phases of the moon"""
    for phase in Moon.PHASES:
      phase_image = Image('{}.png'.format(phase))
      phase_image.blit(self._x, self._y)
      time.sleep(1)