Throughout the song you play:

e|----------------------------------------------------------------|
B|----------------------------------------------------------------|
G|---4------------------------------------------------------------|
D|---4----------5------------7------------------------------------|
A|---2----------5------------7------------------------------------|
E|--------------3------------5------------------------------------|

     B          G            A
Strum however you want to.

You can also play the B at the 7th fret on the E string.

This song isnt actually very good for guitar but this is the way its done.