The following sequence is repeated throughout the whole song:
E|----------------------------------------0----------------------------------|
B|-------0--------0-------0-------0-------0-------0-------0-------0----------|
G|---------------------------------------------------------------------------|
D|-----0--------0-------0-------0-------0-------0-------0-------0------------|
A|----------------------------------5-------4-------2-------0----------------|
E|-3-------5--------3-------5------------------------------------------------|

Alternative: You can also strum down instead of plucking just the D string:
E|----------------------------------------0----------------------------------|
B|-----| 0-0----|0-0----|0-0----|0-0----|0-0----|0-0----|0-0----|0-0----------|
G|-----| 0------|0------|0------|0------|0------|0------|0------|0------------|
D|-----| ↓0------↓0------↓0------↓0------↓0------↓0------↓0------↓0------------|
A|----------------------------------5-------4-------2-------0----------------|
E|-3--------5-------3-------5------------------------------------------------|

Note: It's also possible to play the open A-string instead of the E-string at 5th fret


At some point in the second half he also plays this over the melody:
d||-----||4----7-4--4---7-2--2---4------------||
A||-----||-------------------------5--5---4-5-||
G||-----||•----------------------------------•||
D||-0-0-||•----------------------------------•||
A||-----||------------------------------------||
E||-----||------------------------------------||