this is in an odd tuning, so i'll give the original, plus an easier version. you can also just play it in drop D.

also, this could be tabbed pretty accurately, but IMO, this sort of thing is supposed to be spontaneous, so i'm giving the chords, and you should just mess around on top of them.

original:
tuned to drop D, then 1/2 step down

D    :000232
Csus2:-30010
taps : tap on the body of the guitar with your fingers or fingernails or something

D Csus2 Csus2
D D Csus2 Csus2
D

D			Csus2
  as the sun went away,
Csus2				 D
      you were sending out signals.
D			      Csus2
  you had sugar on you stomach
Csus2				 D
      you had sugar on your hair.
D			   Csus2
  you had sugar underneath your eyes.
Csus2				   D taps
      you had sugar on your mouth.
D taps			 Csus2
  i know that trick too.
Csus2			   D		     D taps
      i know what it means, coming from you.

Csus2 Csus2
D taps D
Csus2 Csus2
D

easy version:
standard tuning. capo on 4. everything is relative to the capo.

A    :-02220
Gsus2:300003
taps : tap on the body of the guitar with your fingers or fingernails or something

A Gsus2 Gsus2
A A Gsus2 Gsus2
A

A			Gsus2
  as the sun went away,
Gsus2				 A
      you were sending out signals.
A			      Gsus2
  you had sugar on you stomach
Gsus2				 A
      you had sugar on your hair.
A			   Gsus2
  you had sugar underneath your eyes.
Gsus2				   A taps
      you had sugar on your mouth.
A taps			 Gsus2
  i know that trick too.
Gsus2			   A		     A taps
      i know what it means, coming from you.

Gsus2 Gsus2
A taps A
Gsus2 Gsus2
A