new_contents: '''
  Flappy Bit
  
  Control the bit by tilting the micro:bit
  
  Avoid the obstacles
  
  Create your own terrain by editing the terrain list below:
  '''
  
  import music
  from microbit import (accelerometer,
                        display,
                        sleep,
                        Image,
                        reset,
                        )
  
  display.scroll('Flappy Bit')
  
  bird = 2
  terrain = [
      (0, 0),
      (0, 0),
      (0, 0),
      (0, 0),
      (0, 2),
      (0, 0),
      (0, 0),
      (3, 0),
      (3, 0),
      (4, 0),
      (3, 0),
      (0, 0),
      (0, 0),
      (0, 1),
      (2, 0),
      (3, 0),
      (4, 0),
      (3, 0),
      (0, 0),
      (0, 1),
      (2, 0),
  ]
  
  terrain_multiplier = 5
  pos = 0
  
  while True:
      sleep(100)
      if -256 < accelerometer.get_y() < 450:
          bird = max(0, bird - 1)
      elif 568 < accelerometer.get_y() < 1024:
          bird = min(4, bird + 1)
  
      display.clear()
      display.set_pixel(0, bird, 9)
  
      pos_terrain = pos // terrain_multiplier
      lost_status = False
      for column, (top, bottom) in enumerate(
              terrain[pos_terrain:pos_terrain + 5]):
          for y in range(top):
              display.set_pixel(column, y, 4)
              if column == 0 and bird == y:
                  lost_status = True
          for y in range(bottom):
              display.set_pixel(column, 4 - y, 4)
              if column == 0 and bird == (4 - y):
                  lost_status = True
      if lost_status:
          display.show(Image.SAD)
          music.play(music.FUNERAL)
          reset()
      pos += 1
      if pos_terrain > len(terrain):
          pos = 0
  
subject: Add flappybit.py example