new_contents: __author__ = 'rileysteyn'
  from .entity import *
  import random
  import math
  class Asteroid(Entity, Movable, Renderable):
      MAX_VEL = 5 # TODO: Balance this
      MIN_VEL = 2 # TODO: Balance this
      VEL_RANGE = MAX_VEL - MIN_VEL
      def __init__(self, canvas):
          Entity.__init__(self)
          Movable.__init__(self)
          Renderable.__init__(self, self._pos.x, self._pos.y,
                              'resources/dean.gif', canvas)
  
          dir = 2*math.pi * random.random()
          vel = Asteroid.VEL_RANGE * random.random() + Asteroid.MIN_VEL
          self._moving = Vector(vel, dir, polar=True)
      def update(self, delta, gx):
          self.move()
subject: Create basic Asteroid class.