3 riffs worth learning on electric guitar

As a little bonus post I will post 3 lessons for 3 well known riffs that you should know how to play on electric guitar and that you can impress your friends and family with.
The lessons are not very long

The first lesson is for the well known riff in "Smoke On The Water" by Deep Purple:




The second lesson is for the cool riff in "American Idiot" by Green Day:




And the third lesson is for the awesome main riff in "Sweet Child O'Mine" By Guns N Roses:




I hope you enjoyed this bonus post and that you will try to learn at least one of the riffs :)

Good luck!