The real song is played with chords, but here is the melody.

------------------------------------------------------------------|
------------------------------------------------------------------|
------------------------------------------------------------------|
-------------3-6-3---1-1-1--------------------3-6-3---1-1-1-------|
-0-4-4-4-4-4-------4-------3-1----0-4-4-4-4-4-------4-------3-1---|
-------------------------------4--------------------------------4-|

repeat this over and over.