old_contents: import sensor, time
  sensor.set_pixformat(sensor.GRAYSCALE)
  fb = sensor.snapshot()
  img = Image("minion.pgm")
  fb.blit((0, 0), img)
  
new_contents: import sensor, time
  sensor.set_pixformat(sensor.GRAYSCALE)
  fb = sensor.snapshot()
  img = Image("minion.pgm")
  fb.blit(img, (0, 0))
  
subject: Update blit example