Crash--->Strumming Problem

[James17]

I have been trying to learnt his song for the last week or so, i have been playing guitar for over a year, and the song doesnt seem that hard to play, however i am a little confused on the strumming...

how many times to i strum each one? 4? 3? Or are some 4 and some are 3?

E:-------------------------------------------------
B:---5------5----5------5----5------5----5------5--
G:---4------4----4------4----4------4----4------4--
D:---2------2----x------x----x------2----x------x--
A:-4-4----0-0--2-2------2----2----0-0--2-2------2--
E:--------------------0-0--4-4----------------0-0--

[DMBFreak84]

some are 4 and some are 3, it starts as 4, then three, then back to four. every time there is a non-zero number, play it four times, each other time play it 3 when there is a zero