It currently writes "Loading" and then, every second, writes a dot, clearing them if a second has gone by with three dots.
It also currently just waits 20 seconds, loading, then has a few ASK blocks.
You can put virtually any loading screen in the LOADING ANIMATION block.
I added a new script, so there are now two of them. Here's the newest one:
It's a long wait response because, to test the loading screen, I would want to have something that takes a while to do.
For me, after the first time, running the first sample script happens instantly. Some kind of browser caching?