Hi, I am currently trying to setup a survey that requires from a data set to only take a specific amount from it, at random, and display them in random order into qualtrics as a survey.

For example, I have a data set of 200 images and I categorize them individually A,B,C,D, where each of these categories has 50 images each associated with them (similar to sub-folders). 

Now, I want to select of these categories 20 images, at random, and combine their randomizations into one display into qualtrics. That is, if I took 20 images taken at random from A and B to display the union of the two sets at random as well.

Is there a way to accomplish this wish custom code or sub-folders / loops in Qualtrics?