new_contents: from SimpleCV import Camera, Image, Display
  
  tv_original = Image("../../sampleimages/family_watching_television_1958.jpg")
  
  tv_coordinates = [(353, 379), (433,380),(432, 448), (354,446)]
  tv_mask = Image(tv_original.size()).invert().warp(tv_coordinates)
  tv = tv_original - tv_mask
  
  c = Camera()
  d = Display(tv.size())
  
  while d.isNotDone():
     bwimage = c.getImage().grayscale().resize(tv.width, tv.height)
     on_tv = tv + bwimage.warp(tv_coordinates)
     on_tv.save(d)
  
subject: add tv example