Tuning is Drop C
This riff is played throughout the song on Clean
[ Tab from: http://www.guitaretab.com/f/for-today/287854.html ]
d|----------------------------------------------------------------|
a|----------------------------------------------------------------|
f|------7-----------3------5--------------------------------------|
c|-----5-----------3------4---------------------------------------|
g|----5-----------1------5----------------------------------------|
C|---5-----------1------3-----------------------------------------|
