Didnt see a good tab for this so I did it myself. I think its right. Its a great little 
riff. Ill indicate up strokes with a U and down strokes with a D above the tablature. 
This is my first tab so maybe the way Ive written it out is somewhat abnormal but bear with me.

      D  D  U  U   D  D  U  U                
e ----------------------------------------|----------