I'm really into this band, Wes and Rostam work wonders together.
This is "Swing Tree", which is extremely simple

BbIf (x1333x@1)I was a boy at sea I would be
GmSwinging (355333@1)from a broken tree I would be
BbDown (x1333x@1)on my back looking 
GmUp (355333@1)at stars at night


Repeat the Bb- Gm progression over and over throughout the song, it doesn't change. 

Nifty right?
Remember, you can stream the whole album at dscvry.net.

-shiek