simple really the chords throughout the song are : A minor 0 1 2 2 0 X F major 1 1 2 3 3 1 C major 0 1 0 2 3 X G major 3 0 0 0 2 3 and the sequence is simply Am, Fmaj, Cmaj, Gmaj. Bass tabs are simple as well A (3-0), F(4-1), C(3-3), G(4-3) g-|-----------|-----------|-----------|-----------| d-|-----------|-----------|-----------|-----------| a-|-0---0-0-|-----------|-3---3-3-|-----------| e-|-----------|-1---1-1-|-----------|-3---3-3-|