Taylor Swift - Safe & Sound Lyrics Meaning

(SPOILERS)
It is basically a song to relay Katniss's feelings to Rue as Rue dies and how she couldn't save her. Like the lines 'Just close your eyes[....]you'll be alright' is saying how Katniss is telling Rue that when she dies, it will be more peaceful and safe than this world. The line 'No one can hurt you now' is suggesting that rue has earned a good place in the next life. 'Don't you dare look out your window, darling everything's on fire/The war outside our door keeps raging on/Hold onto this lullaby even when the musics gone, gone' is telling Rue that she is to far away to save, but that Katniss tried. It also shows the rebellion that Katniss, the girl on fire (hence everything is on fire), will lead.

Sorry, that's really long...