I'm not sure if it's 100% correct but here goes
Chord progression: Am G C Cm Em
Am G C Cm Em
Oh, it's dark, the sun went down, the power's still out
Am G C Cm Em
Oh, it's cold, my blood barely flows
Am G C Cm Em
Oh, i'm alone, except for the sound of insects flying
Am G Cm
around they know my red blood is warm still
Let that last C minor ring, then make a lighthouse sound for the next 6-7 minutes every 20 seconds or so.
If you want the strumming pattern just listen to the song, the guitar part is like 1-2 minutes.