if you want to set or alter each variable:
loop from 0 to the number of variables you have
when setting a variable or adding/subtracting from it, right click where you select the name of the variable and click "use expression", and type 'loopindex' (without the quotes)
I can't think of a way off the top of my head to use the values
like
sprite(loopindex) or anything like that won't work
maybe with python there's a way