[quote:3n9fq2tq]I can use 2 variables and both set them to random (0,8).
Than check if one of the 2 is different and set the frame to one of them.
That's not exactly how to do it, only one needs to be set randomly, you use the other to store the last value for comparison so you don't get a repeat.
I posted an example capx here about randomly selecting music tracks without repeats.
Basically I just used a System->While along with variable comparison until a non-repeat value was found, then I used the new value.
You should be able to adapt it to your case.
EDIT: I ended up adapting it
It waits a random time (or in this case uses choose but random would work too) and displays the current and previous wait times, as well as the number of potential repeats that could have occurred that time around.