Randomization Question (case 25685)

[syzergy]

I've been searching the forums for an answer but haven't found anything that fits exactly. I'm sure there's a solution out there but everything I've tried so far has failed. I have a question about some randomization procedures.

A simplified version is I have a 4 blocks of 10 stimuli and each of the 10 stimuli has 5 items that needs to stay in the same order. So for example, each of the 10 stimuli includes instruction, image, instruction, scale response, scale response (in that order). So each block would have 50 total items (10 stimuli with 5 items each).

I've been assigning each group of items the same BGR number which successfully keeps the 5 items together. However, I also want to keep the first 10 stimuli together (in Block 1) and the second 10 stimuli together (in Block 2), Block 3, and then Block 4. Is there a way to do this? Furthermore, is there a way to then randomize the order the blocks are presented (this isn't as important but would be great). So participant 1 gets Block 1, 2, 3, 4; participant 2 gets Block 3, 4, 1, 2, etc.

Thank you!