text: from adafruit_circuitplayground.express import cpx
  
  cpx.pixels.brightness = 0.3
  
  while True:
      if cpx.button_a:
          cpx.pixels[2] = (0, 255, 0)
      elif cpx.button_b:
          cpx.pixels[7] = (0, 0, 255)
      else:
          cpx.pixels.fill((0, 0, 0))
  