Drop D tuning
e------------------------
B------------------------
G-2-2-0--0-2-2/5-2-2-0-2-
D-2-2-0--0-2-2/5-2-2-0-2-
A-2-2-0--0-2-2/5-2-2-0-2-
E-2-2-0--0-2-2/5-2-2-0-2-
You can also play this riff in power chords if you don't want to bother
with the drop d tuning. I'll put down the chords for that....