My first tab, please correct away.
I just started playing and was frustrated that I couldn't find tab of this online.
After each line in the verse, just riff within the key using standard pentatonic scale style:
(E3-E6-A3-A4-A5-D3-D5-G3-G5-G6-B3-B5-E3)


Walking in
e--------4------------3-----------2-------------------------------|
b ----5-------------4-----------3---------------------------------|
g----4------4------3-----3-----2-----2----------------------------|
D-------------------------------------------3v--------------------|
A---------------------------------------------------1--2--3v------|
E-----------------------------------------------------------------|

Verse
e----------------------------------------------------------------|
b ---------------------------------------------------------------|
g----------------------------------------------------------------|
D----------------------------------------------------------------|
A---2--2----4--4---2--2----4--4----------------------------------|
E---0--0----0--0---0--0----0--0----------------------------------|

v - vibrato