I am creating a TD where each wave starts with a "funny" message from the creeps. The map has 30 waves but I have maybe 50 funny messages I like to use at random. So I need to create a trigger, that sets a variable FunnyString to a random number between 1 and 50. For the next wave FunnyString should be a random number between 1 and 50, but not a number that has been selected before. This has to be done for all 30 waves. Anyone got an idea to create this?