Please tell what kind of bass (either 4 string or 6 string/w/ frets or fretless) and just simply post the tabs for it. Easy as that!
For example, I'll post Iggy's "Sister Midnight" (for 4 strings)
First, play this:
G|-----------------|-----------------|
D|-----------------|-----------------|
A|-----------------|-----------------|
E|-3~--------------|-5~--------------|
Then the rest of the song goes like this:
G|-----------------|---------2-4-----|
D|-----------------|-------------3-5-|
A|-----------------|-----------------|
E|-3---331-3-------|-3---331---------|
Sometimes you skip that little fill and just play this:
G|-----------------|-----------------|
D|-----------------|-----------------|
A|-----------------|-----------------|
E|-3---331-3-------|-3---331-3-------|
And that's pretty much it.