First tab, don't be too harsh :)
First Riff:e|------------------------------------------|B|------------------------------------------|G|------------------------------------------|D|------------------------------------------|A|-------------22-4-2--5-2-4-5-4-2----------|E|-2(b)--00-44---------------------4--0-----|
Second Riff:
Move entire frame up 1 string, repeat
Third Riff:
e|--------------------------------------------------------|B|--------------------------------------------------------|G|--------------------------------------------------------|D|-------44-6-4--7-4-6-7-6-4----------22---22-------2---2-|A|-22-66---------------------6-2--------42---42------42---|E|--------------------------------------------------------|