guitar 1 just plays these two chords the entire song.
guitar 1
e----5----5----|
B----5----5----|
G----5----5----|
D----5----4----|
A----7----5----|
E----5----X----|
guitar 2 plays this riff in rhythm with guitar 1
[ Tab from: http://www.guitaretab.com/s/slightly-stoopid/230148.html ]
e----------------------------------------------------------|
B----------------------------------------------------------|
G----------------------------------------------------------|
D----------------------------------------------------------|
A-------5--3--------5-----3--------5--3-----5--------------|
E-----5--------3/5-----5--------2----------2-2---2---3---4-|
e----------------------------------------------------------|
B----------------------------------------------------------|
G----------------------------------------------------------|
D------------------------------------------4--4--5--6--7---|
A-------5--3--------5-----3--------5--3--------------------|
E-----5-------3/5-----5--------2--------2------------------|