Pretty straight forward cool bass line, this one. ...... but then again aren't most such 
bass lines straight forward?!

G------------------------------|
D------------------------------|
A--8------66------88-------66--|
E ----8---------------8--------|

This is the guts of the riff.  However, you could probably add a few extra notes here 
and there such as an extra Eb ( 6th fret on the A string) at the end. The two F notes (8th 
fret on A string) sound better in my opinion if played staccato. Anyway, just have fun! Hooroo.