From their "Kid A" album

Tuning: Standard (EADG)

There is one riff repeated throughout the entire song. 
I have listed a few different ways how to play the riff.

Start at 0:02 and end at 5:11 into the song.

Method 1
G|------------------------------| This is the easiest way to do it,
D|-4-000--4-0000--3-000--2-0000-| but it can get a bit boring.
A|------------------------------|
E|------------------------------|

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Method 2
G|------------------------------| 
D|-4------4-------3-------------| I play the song this way because it keeps
A|---555----5555----555--7-5555-| my fingers moving instead of just staying
E|------------------------------| in one place.
                         ^
Note: This 7 can be played as 2 on the D string, but I find this way easier.

----------------------------------------------------------------------------

Method 3
G|-----------------------------------------| 
D|-----------------------------------------| Colin plays it like this live.
A|-9--------9----------8--------7----------|
E|---101010---10101010---101010---10101010-|
                                ^
Note: This 7 can be played as 12 on the E string if you think that's easier.
Note: 101010 is played as 10-10-10, not 1-0-1-0-1-0.
----------------------------------------------------------------------------

Once you choose which method you want to play with, have fun playing along
to arguably one of the easiest basslines ever created.


| /  slide up
| \  slide down
| h  hammer-on
| p  pull-off
| ~  vibrato
| +  harmonic
| x  Mute note