I am just going to show u the fun part..Many already know this beacause it is so popular!!!

h=hammer
Ill show you two ways too do this..the long way and short way! :)
G ------------------------------------
D ------------------------------------
A 2---5h5--7-7---9-10-9-10-9-10-5-5-77
E ------------------------------------
(long way^)


G -----------------------------------
D - 0-0---2-2--5-4-5-4-5-4---0-0--2-2 
A 2----------------------------------
E------------------------------------
(or on the D string for 5-4 5-4 5-4 it can be on g string 0-4 0-4 0-4) short version the better way^

ROCK ON!! and have fun