Well, its fairly simple. We already have our trigger. But it has no clue what object we want to change the properties of. So we label our movie clips and can control them by name. We now have our trigger and our target.
Lets make it do something.
Since we want this to randomly change its size we need to use a random variable. Normally if we didn't want the random changes and just a set hard percentage you would just type in just the number. In this case it selects a random number between 0 and 299. So now it randomly selects a number between 10 and 299. Now we need to add the Scale Factor for Y .