content: '*********************************************************************
  '** (c) 2016-2017 Roku, Inc.  All content herein is protected by U.S.
  '** copyright and other applicable intellectual property laws and may
  '** not be copied without the express permission of Roku, Inc., which
  '** reserves all rights.  Reuse of any of this content for any purpose
  '** without the permission of Roku, Inc. is strictly prohibited.
  '********************************************************************* 
  function Main()
      screen = CreateObject("roSGScreen")
      port = CreateObject("roMessagePort")
      screen.setMessagePort(port)
      scene = screen.CreateScene("MainScene")
      screen.show()
  
      while true
          msg = wait(0, port)
          if type(msg) = "roSGScreenEvent"
              if msg.isScreenClosed() then exit while
          end if
      end while
  end function
  