Random and fullrandom stimuli in one loop

If this template helps then use it. If not then just delete and start from scratch.

OS (e.g. Win10): MacOS
PsychoPy version (e.g. 1.84.x): v2023.2.3
Standard Standalone? (y/n) If not then what?:y

What are you trying to achieve?:
I set up a loop, in which I have 4 parameters. I want the first two parameters to be ‘random’ presented, and the last two parameters to be ‘fullRandom’ presented.
For example, my file look like:
parameter1. papameter2. parameter3. parameter4
A A a a
B B b b
C C c c
D D d d

And I want it to loop like this.
parameter1. papameter2. parameter3. parameter4
C C a c
B B d a
A A b b
D D c d

What did you try to make it work?:
I looked over instructions and googled this, but I cannot find a way to do ‘random’ and ‘fullrandom’ in one loop.

All help and suggestions are very welcome!

If I understand you correctly, this sounds like a use case for my independent randomisation demo.