Green Hell

One of the riffs is just doing a lot of 3`s on the E 
string,like below. The timing is something like 
16th notes. 
 
G|---------------------------------------------| 
D|---------------------------------------------| 
A|---------------------------------------------| 
E|-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-| 
 
Another riff in there is this, the main one.... 
 
G|----------------------------| 
D|------------------------1---| 
A|----------------------1---3-| 
E|-3-3-3-3-3-3-3-3----3-------| 
 
The last riff is this, used in the chorus, 
"green hell, green hell" part. 
 
G|---------------------------------| 
D|---------------------------------| 
A|---------------------------------| 
E|-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-3-| 
 
G|---------------------------------| 
D|---------------------------------| 
A|---------------------------------| 
E|-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-| 
 
After one of the chorus`s (either the 1st or 2nd time, 
I`m not sure), there is a little fill that goes 
something like the little riff below. 
 
G|--------------------| 
D|------7-------------| 
A|-5-7----7-5---------| 
E|--------------7-6-5-|