1. ```
@Override
protected void postImpl() {
if (this.pfullscreen != this.fullscreen) {
this.window.setFullscreen(this.fullscreen);

/*
* Wait for the window to change its mode.
* Don't wait for more than `5000` milliseconds!:
* ...yes, that should crash the program :|
* (It didn't, during my tests, surprisingly :O
* The window just... waited there and didn't change states O_O
* ...and then Processing began rendering again :D
```