This is a pretty interesting project, because the sprite that's going to your mouse doesn't know where your mouse is, and the only way he can find out is by using the list called "Inf," but it would seem that list is filled with nothing but zeros. So how can it read the list of zeros? Turns out each one of those zeros is also either a string or an integer. How though can you read a list of strings and integers? The costumes named "0" and "1," will allow this because there are two ways you can find a costume you're looking for, you either type in the name, a string, or the number, an integer. As it turns out 0 is the only integer that when put into the switch costume block will not be converted to a string first, which works well for us. The integer (0) mod (costume length) will always set you at the last costume, which in our case is 1, whereas the string 0 will always set you to the costume named 0. This allows you to read the binary number which you then convert back to two integers for X and Y.