this song is pretty much two riffs
g|----------------------------------------|
d|----------------------------------------|
a|-----------------------------3----------|
d|-0-3-5-6-5-0-1-0-------0--3--5--6-5-0-1-|
 

and the second riff is
g|-------------------------------------------------------|
d|-------------------------------------------------------|
a|-------------------------------------3-----------------|
d|--0--3--0-3--0-1-0---3---0---3-0-1-1-------------------|
 
Tool is amazing,peace out