text: from star import Star
  from levelbase import LevelBase
  import jngl
  
  class MovingStar(Star):
      def __init__(self, x, y, toX, toY):
          Star.__init__(self, x, y, "red")
          self.xspeed = 0
          self.yspeed = 0
          self.fromX = x
          self.fromY = y
          self.toX = toX
          self.toY = toY
          if self.toX > self.fromX:
              self.xspeed = -1
          if self.toX < self.fromX:
              self.xspeed = 1
          if self.toY > self.fromY:
              self.yspeed = -1
          if self.toY < self.fromY:
              self.yspeed = 1
      def step(self):
          if self.x == self.toX or self.x == self.fromX:
              self.xspeed = -self.xspeed
          if self.y == self.toY or self.y == self.fromY:
              self.yspeed = -self.yspeed
          self.x += self.xspeed
          self.y += self.yspeed
  
  class Level(LevelBase):
      def __init__(self):
          LevelBase.__init__(self)
          for x in range(170, 750, 70):
              if x != 450 and x != 520:
                  self.stars.append(Star(x, 280))
                  self.stars.append(Star(x, 360))
          self.stars += [MovingStar(250, 200, 400, 400), MovingStar(750, 440, 500, 300), MovingStar(485, 200, 485, 400)]
          self.movingStars = self.stars[-3:]
      def step(self):
          for star in self.movingStars:
              star.step()