Troubleshooting randomization

I am working on a survey with multiple blocks.

I would like to randomize whether the block "evaluation questions" appears before or after a different set of blocks.

I have randomized blocks B and C to vary which one occurs. In one condition I would like "evaluation questions" to come before B/C, but in another condition I would like "evaluation questions" to come after B/C. If "evaluation questions" were randomized to not appear after the initial instructions, then I would like it to appear after blocks B/C, but before the demographic questions. I want the instruction and demographic blocks to stay in the same place, regardless of condition.

I'm not randomizing between two different blocks, which is why I'm finding it a bit tricky. Any help would be much appreciated 😀


!