DeclareDesign Community

Simulate pre-post data in fabricatr

I’ve been going through a lot of the tutorial materials but I’m still not quite getting how to use declare design to simulate data. I would like to generate simulated data sets for quite a simple design: Group A and Group B are measured at time 1, then assigned to placebo or active treatment, and are measured at time 2. I have looked in the design library and see this kind of design in there, but could not see a function that just outputs a simulated data set. Is there a simple way to do this using fabricatr? Secondly, is it possible to extend this to imagine that participants are measured on 5 items at time 1 and time 2 (i.e., multiple correlated observations per subject but at the same time)?

Any help would be greatly appreciated! - it looks like declare design could be very powerful but also a bit hard for me to just pick it up and roll with it, so an example would be fantastic.