This is some actual code from one of my projects (though written by another contributor):

   To transition to monster card gallery:
   	animate the gallery-transition as a reel animation targeting the transition-container at 8 fps;
   	wait for main menu input until all animations are complete;
   	pause for 1000 milliseconds, accepting input;
   	now the image-ID of the transition-container is the image-ID of the card-container.

The language is Inform 7, and it's using the Glimmr library. https://github.com/i7/kerkerkruip http://inform7.com/ http://glimmr.wordpress.com/