Two groooovy riffs:
(The notes are right but the rhythm maybe is not exact (... I have no patience)... so hear to the song for the rhythm, it's better! I hope that the bird won't annoy you!)

RIFF #1
Guitar chords:
C C C #   G  G #   G G G #   G G G #

Bass Tab: (only the third string (A))
A--3-3-3--5--5--5-5-5--5-5-5--5-7-7-7--10-10--10-10-10--10-10-10- (only for the first time)

A--7-7-7--5--5--5-5-5--5-5-5--5-7-7-7--10-10--10-10-10--10-10-10-

Farfisa part: (very approximate but sounds good! No patience to write down the correct score for the rhythm... listen to the song!!! Notes with "|" played with right hand.):

For the first time:

   ==   ==   ==
---|----|----|---------
  @|   @|   @|     =
---|----|----|----O|---
  @|   @|   @|     |
---|----|----|----O|---
   |    |    |     |
--@|---@|---@|----O|---
        
------------------O----
 
  @    @    @   

The other times:

   ==   ==
---|----|------------
  @|   @|        =
---|----|-------O|---
  @|   @|        |
---|----|-------O|---
   |    |        |
--@|---@|-------O|---
        
--@----@--------O----
 
Tim's guitar melody (just played once during the second G-chord):
(only on the last three strings, the lowest)

D-----------5------
A---2-3-2-2---2----
E------------------

D-----------------
A---2-3-2-3--2----
E--------------5--

Drums: well.. it's just a 4/4!!!

RIFF #2
Guitar chords:
C6 C6 #   G7+  G7+ #   G7+ G7+ G7+ #   G7+ G7+ G7+ #

Bass Tab: (only the third string (A))
A--12--12---14--14-14-14-14-14-14-14-14-14-14-14----

A--12--12---16-16--14-14-14-14-14-14-14-14-14-14-14-

A--16--16---12--14--14-14-14-14-14-14-14-14-14-14---

A--12--12---16-16--14-14-14-14-14-14-14-14-14-14-14-

Vox Organ part: (very approximate but sounds good! No patience to write down the correct score for the rhythm... listen to the song!!! Notes with "|" played with right hand):
 
   =
  O|
   |         =
---|------#-O|---
  O|         |
---|--------O|---
  O|         |
------------O|---
    
------------O----
        
--O--------------
            O
  O
 

C  G  (x2)

C     G
To compose,

C G (x3)

C        g
and decompose,

C G (X2)

C       G
to decompose

C G

C     G
to compose

C6  G7+
        The ebb and flow

C6  G7+
        of the darkness

C6  G7+
        The ebb and flow

C6  G7+
        de ma paresse
 

C G
     To compose

C G

C       G
to decompose

C        G
and recompose
 

C6  G7+
        From a minute

C6  G7+
        to another

C6  G7+
        From miniscule

C6  G7+
        to the grandeur

C G (X2)

C    G
Decompose

C    G
I wander

   C   G
and I  slip.

C  G (X2)
 

C6  G7+
        Get all those ghosts

C6  G7+
        out of my sight

C6  G7+
        They devour

C6  G7+
        all of my might.
 

C G (X13)
 

The chords used:
 

C G C6 G7+