I'm not really sure about this, especially the intro, but the part i have as the main 
riff is more or the the bass line so let me know
Main
|---------------|
|---------------|
|4-4------------|
|4-4-4-4-6-6-4-4|
|2-2-4-4-6-6-4-4|
|----2-2-4-4-2-2|

Outro
|-------------------|
|-------------------|
|-----4-44------4-44|
|6-66-4-44-4-44-4-44|
|6-66-2-22-4-44-2-22|
|4-44------2-22-----|