Standard Tuning for a 4-string bass-  (High  to Low)  G-D-A-E

S  = slap
P  = pluck
p.m.  = palm mute
h  = hammer-on

                   P        P
|----------------------------------|
|------h7---7-------0--------------|
|-0-----0-----h8-0-----------------|
|----------------------------------|
  S   S/p.m.     S/p.m. 

                   P        P
|---------------------0------------|
|------h7---7----------------------|
|-0-----0-----h8-0-----------------|
|----------------------------------|
  S     S/p.m.   S/p.m. 


                  P        P
|----------------------------------|
|------h7---7-------0--------------|
|-0-----0-----h8-0-----------------|
|----------------------------------|
  S   S/p.m.     S/p.m. 


                  P        P
|-------------0--------------------|
|------h7----------0---------------|
|-0-----0-----h8-0-----------------|
|----------------------------------|
  S   S/p.m.     S/p.m. 


If you understand how to play this, I am impressed!  It sounds really cool if you play it fast.  I just made 

this little riff up, and I couldn't make anything else to go with it.  I usually just play it to get my hands 

warmed up, or if I'm bored or something.  Have fun...