Red

The bass for the opening is:

Main Verse Riff:

This gets transposed to positions 1 step up and 1 1/2 steps up.
Fripp also plays at the end of the riff sometimes a "sick" sounding note
which is:
(i)  and  (ii)
  s

So the 1st verse is played if we call the main riff E , the transposed
riffs of 1 and 1 1/2 steps F# and G respectvely and including the "sick"
notes (i) and (ii) we get the sequence...
 E  E  F#  E (i)  G  G  E (i)    then 1st chorus
 2nd time through it is....
 E  E (i)  F# (ii)  E (i)        then 2nd chorus
The bass drones these notes as roots for this section playing octaves
for accents.
Chorus:
This is played twice:
guitar
                               free rhythm

bass
                               s   s         s   s

then
for the 1st chorus play these chords (free rhythm)

note that these are just the position for fingers. the rhythms
are up to you. The last bar has that little descending riff
to the C which is played for that bar.
For the second chorus

bass

The sort of Bridge section after this.

bass

Middle Break
The chords for the middle break are:
Hit each as many times as indicated...
20X   32X    3X     5X    24X    16X    1X    1X

 32X    3X    5X     24X    8X     2X    1X

The middle break has the baseline....