Тональность

 
A A D E
e|---0-------------0-------------2------------0-------------------------
b|---2-------------2-------------3------------0-------------------------
g|--2-------------2-------------2------------1--------------------------
d|----------------------------0-----------------------------------------
a|0-------------0-------------------------------------------------------
e|-----------------------------------------0----------------------------
 
Or play it like this: (neat little exercise thingy too)

A A D E
e|---0-------------0-------------2------------0-------------------------
b|---2-------------2-------------3------------0-------------------------
g|---2-------------2-------------2------------1-------------------------
d|-----------------------------0----------------------------------------
a|-0-------------0------------------------------------------------------
e|------------------------------------------0---------------------------
x2 x2 x2 x2

Just those 4 chords, over and over again :)

The idea is to fool around with the rythm 
and just put your heart into it.
Create some tourself, there's probably hundreds of ways 
you could play this
great reggae beat

A D E
e|---3-------------3-------------5--------------------------------------
b|---3-------------5-------------7--------------------------------------
g|---4-------------5-------------7--------------------------------------
d|---5-------------5-------------7--------------------------------------
a|---5-------------3-------------5--------------------------------------
e|---3-------------3-------------5--------------------------------------