How to randomize order of actions?

Just a question on randomization.

I have three main (blocks) of actions, for example:

1) like,
2) comment,
3) contact.

After I've logged in, I need to randomize the order of all three main actions, i.e. 2,1,3 or 3,1,2, etc. All actions can only be done once.
I'm unable to come up with a solution with random number that doesn't redo the same action (in a possible infinite loop).

I thought of maybe put the Nos: 1,2,3, in a list >take random No > delete the No in list > go to switch that correspond with main action > finish when list is empty.
Problem is I have many accounts, and need many lists!

Problem with that it is the same actions, 1, 2, 3. I'm hoping to avoid this and perform every block of actions in a different order, each time I log in.

Thank you both. I think both ideas can be valid.

Lokiys example looks good, but if number 3 is used each time (and counting down), then sequence is the same (although going backwards). A possible problem is if you affix random number on the end, say 2, ZP may chose either the number above/below again and again (possible loop). It's difficult to cross off number 2 (example) once it's completed. Maybe the list is the only best bet.

About the list; maybe I will create a unique, temporary list file at start of each template (use random name for each file name) > then populate with: 1, 2, 3 > when finished, then delete temp file. Your thoughts?

Thanks Tobias for that template, that was what I had in mind.

Shame ZP doesn't have this feature built in. We know that some of the major social sites use machine learning (or a learning algo), that silently looks for possible 'rogue' actions, then tries to eliminate them (or ban accounts) when it spots the same actions again in the future. It's easy to spot if sequence of actions are repetitive (anyway, you all know this!).

Thanks folks!

Template ran perfectly first time, and performs each block of actions randomly.