Random problem

[dontknow]

Hello, first of all I would like to apologize for my english.
Second: I'm facing a problem with random events, I'll try to be brief.
So I have this frame where my object is randonly sized (by object resizer extension)and there is 11 types of sizes. At the start of the application the "user" can select how many types of size he would like to be shown (up to 11). So I set Random(Val(Number of stimulus))- where "number of stimulus" is the global string that he typed at the begin of the app.
Then I set for each of the possibles results one type of size (maximum of 11). So far, so good.
My problem: If the "user" had seen one type of size he cannot see it again. An exemple: I have 11 conditions, one of them is chosen randonly, let's say it's number 7. Next time he runs the frame number 7 cannot be chosen again! The app ends when all the number have been chosen, and all the conditions shown. It's like a problem with an urn, every time I pick up a ball randonly until it has no more balls, but I cannot pick a ball that I had already picked!
So I tried everything I could think of, and I just couldn't do it. If anyone has a expression or one way to do it I would really appreciate.

[LB]

You have three options:
1. Add the sizes to a list object, and when you pick a random one from the list, also delete it.
2. Use the Random Pool object, it does this for you.
3. Use the Random Multipool object, it does the same as the Random Pool object but with multiple 'lists' and more features.

I recommend #2 for this situation

[dontknow]

I had to use the multipool object...Anyway, thank you so much you saved my project!