Random Generator to Trigger Movie Samples

Hello all, i am a massive newbie on max and I am trying to write a patch to allow me to conduct subjective testing for my MSc final project.

I have 16 x 20s movie clips that I want to trigger randomly when bang is pressed. I have figured out how to load the clips into the patch and how to switch between them. I also have the random number generator to create a number between 1-16 but I can't figure out how to make the random number trigger a clip. So for instance if 3 is the number then clip 3 is triggered etc...

This is what I currently have, any help would be much appreciated.

Thank you