This script introduces a new command that allows you to tell an event to stop and wait until a certain condition is met before proceeding.
RPG Maker comes with a wait command, but that is only to check whether a certain amount of frames have passed before proceeding. This custom wait command allows you to condition on things such as the value of a switch or variable, player input, or anything else that you can imagine that can be done with formulas.
The command is provided in two formats: a marked up conditional branch, or a script call so that you can choose which one you are most comfortable with.
Personally I haven't come up with any practical uses for this, so if you have any ideas what kind of opportunities this creates do share them.
So for example the screenshot above starts by displaying a message, and then it will wait. It will continue to wait until the variable reaches 20. Once the variable reaches 20, it will then proceed to display another message.
Another common use case is waiting for a certain key to be pressed (or any key for that matter).