Riff 1 e---------------------|---------------------- b---------------------|---------------------- g---------------------|---------------------- d-3-3---3-5-6-5-3-----|-3-3---3-5-6-5-3-2---- a-----------------3---|---------------------- e---------------------|---------------------- Riff 2 e---------------------|---------------------- b---------------------|---------------------- g---------------1-1---|-----0-0-------------- d-0h1-3-3---0h1-------|-0h1-------0h1-4-4---- a---------------------|---------------------- e---------------------|---------------------- Riff 3 e---------------------|---------------------- b---------------1-1---|-----0-0-------------- g-----2-2-------1-1---|-----0-0-------3-3---- d-0h1-3-3---0h1-------|-0h1-------0h1-4-4---- a---------------------|---------------------- e---------------------|---------------------- That's basically it. The bass line pretty much follows the guitar line. Listen to the song to work out the correct structure.