riff 1:
d)-0-3/2p0-1-0-3/2p0-6-        
a)-0-3/2p0-1-0-3/2p0-6-
d)-0-3/2p0-1-0-3/2p0-6-

riff 2:
d)-0~3/6/5-000~3/6/5
a)-0~3/6/5-000~3/6/5
d)-0~3/6/5-000~3/6/5

riff 3: (play fast)
d)-00-9-0-8-0-000-9-0-8-0-7
a)-00-9-0-8-0-000-9-0-8-0-7
d)-00-9-0-8-0-000-9-0-8-0-7

riff 4:
d)-0-11h12p11-0-11///(8)-8
a)-0-11h12p11-0-11///(8)-8
d)-0-11h12p11-0-11///(8)-8

legend:
/:slide
( ):finger only
p:pull off
h:hammer
~:let vibrate

there it is some kick ass riffs i made up heres a coulple bass riffs:(also could be played on a guitar)

e)-1212-10-8-7-77-5-3-2-0~6666-0~6666-0~6666-77-5-3-2-0~

e)-4444-1-2