The timing on that new riff posted by Tony is important. If we count it out as: one - and - two - and - three - and - four - and, the riff would go like this:
one - and - two - and - three - and - four - and - one
ROOT...................4 to 5 slide......7b......OCTAVE......4........3b..... ROOT
(hope this makes sense)
Practice this riff (Tim and Buck!!) as you will be asked to demonstrate your mastery of it at the next blues class