I'm fairly sure this is right, it sounds fine anyway.
If you want to know what it sounds like or what the notation for it is go to:
http://www.8notes.com/scores/5389.asp?ftype=gif

I haven't bothered with the timing or anything, because its pretty simple anyway. If you 
stuck go to the link above and theres a little player that plays the tune exactly for you.

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

  ---------------------------------------------------|
  ---------------------------------------------------|
  -----------4-2-4-5-7-7-7-4-4-2-2-4-2---------------|
  -----5-5-5---------------------------5-5-5---------|
  -5-5-----------------------------------------------|
  ---------------------------------------------------|

  ---------------------------------------------------|
  ---------------------------------------------------|
  -7-4-2-4-5-4-2---4-4-4-7-5-4-2-2-2-----------------|
  ---------------5-----------------------------------|
  ---------------------------------------------------|
  ---------------------------------------------------|

  ---------------------------------------------------|
  ---------------------------------------------------|
  -----------2-4-2-4-5-7-5-4-2--2-4-4-2--------------|
  -----5-5-5----------------------------5-5-5--------|
  -5-5-----------------------------------------------|
  ---------------------------------------------------|

There ya go.