new_contents: from twisted.internet import reactor
  import core.module
  import core.fields
  import core.fields.io
  import core.fields.persistant
  import time
  
  class OutsideBrightness(core.module.Base):
      update_rate = 10
      class Brightness(
              core.fields.sensor.Light,
              core.fields.io.Readable,
              core.fields.Base):
          pass
  
subject: fix name OUtsideBrightness Sensor