Riff A G--------------------------------| D--------------------------------| A--------------------------------| E-7-7h8--7-7h8--7-7h8--3--5555---| Riff B G-----------------------------------| D-----------------------------------| A-----------------------------------| E-7-7---1-1---5-5-5h6p5h6h5p6h5h6---| Riff C G---------------------------------------------------------------| D---------------------------------------------------------------| A--------7h9h1097--------7h9h1097---------3h5h653-------3h5h653-| E-7-7-7-----------7-7-7-------------3-3-3---------3-3-3---------| Those three riffs comprise pretty much the whole song, maybe with a bass fill or two. listen to the song to figure out where to place them.