Generate random numbers (from 1 - 8) for choice experiment without repeating

Please, I am trying to generate random numbers in a repeated fashion in such a way that any number generated in the first instance will not be repeated in the subsequent generations.
Then, for each generated number (between 1-8), a picture will be displayed for respondents to make a choice based on the picture displayed.
I have attached the relevant parts of my XLSform.
I would be grateful if anyone could be of assistance.

Welcome @salis2018
Maybe the following is helpful for you

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Thanks so much. It’s not exactly what I wanted, but I got useful information from the links shared.