Iron Man - Black Sabbath
Gotta be one of the all time great rock metal riffs of all time.
It's simple but not so if you wanna get it just right... listen close to the recording and try and make it sound as close as you can.
I'm not 100% sure that the way I show the intro is right - but it sounds real close. Hard to hear exactly what is going on cos I'm sure there is more than one guitar part!
Write it out in your own tab if you struggle to get it from the video - just use the blank tab.
Hope you dig.