Originally Posted by: ROCK ONsorry man, i meant 12 bar riffs like

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So you are looking for 12 bar blues riffs? Well I got some tips anyway:

12 bar blues chord progressions generally go something like this:

I chord for 4 bars
IV chord for 2 bars
I chord for 2 bars
V chord for 1 bar
IV chord for 1 bar
I chord for 1 bar
V chord for 1 bar (optional, can leave as just the I chord)

Let's say we are playing in the key of A, So the I chord is Amajor, the IV chord is D7, and the V chord is E7

To play in the blues/rock style, a good tip for playing solos over the 12 bar blues in A is to play the A major pentatonic/blues scale over the A and E chords, and to switch to the A minor pentatonic for the IV chords.
Try it out, it should sound good.
It's not the only way to go about it, but it's a great start.