new_contents: # Vertical Flip - Horizontal Mirror - Transpose
  #
  # This example shows off how to vertically flip, horizontally mirror, or
  # transpose an image. Note that:
  #
  # vflip=False, hmirror=False, transpose=False -> 0 degree rotation
  # vflip=True,  hmirror=False, transpose=True  -> 90 degree rotation
  # vflip=True,  hmirror=True,  transpose=False -> 180 degree rotation
  # vflip=False, hmirror=True,  transpose=True  -> 270 degree rotation
  
  import sensor, image, time, pyb
  
  sensor.reset()
  sensor.set_pixformat(sensor.RGB565)
  sensor.set_framesize(sensor.QVGA)
  sensor.skip_frames(time = 2000)
  clock = time.clock()
  
  mills = pyb.millis()
  counter = 0
  
  while(True):
      clock.tick()
  
      img = sensor.snapshot()
      # You can also use "set" or "assign".
      img.replace(img, vflip=(counter//2)%2,
                       hmirror=(counter//4)%2,
                       transpose=(counter//8)%2)
  
      if (pyb.millis() > (mills + 1000)):
          mills = pyb.millis()
          counter += 1
  
      print(clock.fps())
  
subject: Add new code example