Discovered the "builder disk", and I tried it for my little robot in my creative test world.
First, I tried to build an nbt file, but the robot just placed blocks randomly.
Then, I tried to find a tutorial, but nothing.
After that, I found an "example.plan" (/mnt/[insert disk name here]/usr/file and tried to build it; and it worked!
So I tried to do my plan. I was on the logic that the robot wanna place blocs if I set special numbers (for each slot) for them and I worked 1 hour to make it. Finally, I finished the file, which is very long btw for a simple house. I saved it,