I want to set up a world with a border that is 170x170 blocks, and every minute water will rise by one block across the entire map. This will keep happening until the map is full of water. I just want to replace the air blocks and leave everything else alone.
I am very new to command blocks and I don't really know how to use their commands properly.
An example of what I am trying to do is this, but I want to set it up so that it is automatic.
I found this video but the commands are outdated and don't work in 1.14.14 Java edition.