Listen to the song for the timing.
Main riff:
G|-------------------------------|
D|-------10-10-101210-10---10-10-|
A|--10h12------------------------|
E|-------------------------------|
The 101210 part is NOT a hammer on.
Bridge:
G|----------|
D|-10(x64)--|
A|----------|
E|----------|
My first tab, enjoy.