content: 
  sub Main()
      print "in showChannelSGScreen"
      screen = CreateObject("roSGScreen")
      m.port = CreateObject("roMessagePort")
      screen.setMessagePort(m.port)
      scene = screen.CreateScene("PantallaDeUsuario")
      scene.backgroundColor= "0x000000"
      scene.backgroundUri = ""
      screen.show() 
    
      while(true)
        msg = wait(0, m.port)
        msgType = type(msg)
    
        if msgType = "roSGScreenEvent"
        if msg.isScreenClosed() then return
        end if
      end while
  end sub