from microbit import*

img1 = [ Image('00900:09090:90009:09090:00900:')]
img2 = [ Image('00000:09990:90009:09990:00000:')]
while True:
  display.show(img1)
  sleep(1000)
  display.show(img2)
  sleep(1000)
  display.show()
  sleep(500)