e ---15----------12----------13------15----------12----------13------|
b -------12--13------12--13------12------12--13------12--13------12--|
g -------------------------------------------------------------------|
d -------------------------------------------------------------------|
a -------------------------------------------------------------------|
e -------------------------------------------------------------------|


e ---13----------------------12------13----------------------12------|
b -------12--13--15--12--13------12------12--13--15--12--13------12--|
g -------------------------------------------------------------------|
d -------------------------------------------------------------------|
a -------------------------------------------------------------------|
e -------------------------------------------------------------------|

(just keep repeating these 2 blocks together)