There really is no bass guitar in this song but i made a riff that fits perfect with it. 
follows the bass drum in the song.

Riff 1.

G:------------------------------------------]-----------------------|
D:--------------------------(play 3 times)--]--0~~~~~0~~~~0~~~~~0-x-|
A:-------------3-xxx-3-xxx------------------]-----------------------|
E:-0-xxx-3-xxx------------------------------]-----------------------|

Riff 2. (hold all notes)

G:---------------------------------------------------|
D:------------------------0--------------------------|
A:---------------3-----------------------------------|
E:-0------3------------------------------------------|

Riff 3. (hold all notes)

G:-----------------------------------------------------------|
D:-----------------------------------------------------------|
A:---------3---3-------3---3-------3---3----3---3---3---3----|
E:-0---3---------0---3-------0---3-------0-------------------|


*Starts with bass drum on first chorus*

Riff 2 X 4
Riff 1 X 2
Riff 2 X 4
(guitar bridge)
Riff 2 X 4
Riff 3 X 1