content: ' entry point of  MainScene
  sub Init()
      ' setColorScheme()
      ' set background color for scene. Applied only if backgroundUri has empty value
      ' m.top.backgroundColor = "0x662D91"
      ' m.top.backgroundUri= "pkg:/images/background.png"
      InitScreenStack()
      ' RunContentTask()
      ShowPlayScreen()
  end sub
  
  sub RunContentTask()
      m.contentTask = CreateObject("roSGNode", "MainLoaderTask") ' create task for feed retrieving
      ' observe content so we can know when feed content will be parsed
      m.contentTask.ObserveField("onContentLoaded", "ShowPlayScreen")
      m.contentTask.control = "run" ' GetContent(see MainLoaderTask.brs) method is executed
  end sub