content: function init() as Void
    m.hardcodedImageUrls = ["pkg://images/fullscreen_earth.jpg", "pkg://images/fullscreen_moon.jpg"]
    m.backgroundPoster = m.top.findNode("backgroundPoster")
  
    m.menuHolder = m.top.findNode("menuHolder")
    m.mainMenu = m.menuHolder.createChild("mainMenu")
    m.mainMenu.observeField("itemFocused", "menuItemFocused")
    m.mainMenu.setFocus(true)
  end function
  
  function menuItemFocused() as Void
     m.backgroundPoster.uri = m.hardcodedImageUrls[m.mainMenu.itemFocused]
  end function
  