Basically, for now on, the grid acts as a VM. Read ALL of the instructions! Basically, this is the format: So far, the last slide has the events of slide 30, then the events of slide 29. If you were to add another slide, then it would have the events of slide 32, then the events of slide 31. The slide after that has the events of slide 34, then the events of slide 33, and so on.
Credit to Patcail.