Minecraft?

How do I let water rise. The big YouTubers always make such videos with the water rising every second and I would want to do something like that but have no idea how to do it.

These are plugins. Worldedit.

Select the desired area, // set water, then a command to set the desired area in the coordinate Y (height) +1, again // set water, etc.

Worldedit can be a mod

"can be a mod"?

Please in German…