From the album "Play"
(poorly) tabbed by Patrick Vacek
Standard Tuning

Main Riff
e|--------------------|
B|--------------------|
G|-------8---10---8---|
D|---8---8---10---8---|
A|---8---6---8----6---|
E|---6----------------|

Alternate Riff (played somewhere in the middle)
e|-----------------------|
B|-----------------------|
G|--------10---12---10---|
D|---10---10---12---10---|
A|---10---8----10---8----|
E|---8-------------------|

This song is actually a synth song, but you can pretend that there is a guitar.
I’m not sure about the alternate riff. It might be a fret or two off.
If the Eb in the main riff doesn’t sound right, try playing it on the 11th 
fret on the E string.