Random variables [renamed]

I’ve been working on a deal or no deal game (my first game) and I’m stuck. I just need a script to make 22 variables that are randomly equal to numbers 1 - 22, so I get a result like this:

box01 = side09;
box02 = side12;
box03 = side19;


box22 = side04;

thanks

EDIT: I should probably clarify that all 22 numbers need to be different.