Asked for help and got a great answer. Totally happy now. My gut feeling that I was not doing it right / smart was right. ( at least for blender) My approach is too much like what I am used to in 3D cad programs, were the things I draw, need to be possible to produce. Which is totally irrelevant for...

I had not heard that track before. :)
Computer games don't affect kids, I mean if Pac Man affected us as kids, we'd all be running around in darkened rooms, munching pills and listening to repetitive music.

We have movement. Can't figure out yet how to export this as a vid from blender, so for now used a screen recorder. ...
Corridor design is done, and I am happy.

Now want to make it longer and add two bends, and animate the red lights.
You're using a very old version of LMMS.

Backup anything you don't wanna loose.

Uninstall lmms.

Get LMMS from here:

Install LMMS 1.2.1 :)
Not yet. I do hope to have maybe the red lights react to music. Blender can do it, but I am not there yet. The red lights are blocks, and I think I can make them move. There are tutorials of Ducky 3D , who has made allot of videos, for our needs. ( background to our songs )
Small steps forward
Are you on Linux, and have you installed wine?
Maybe I need to dig harder. :) About blm, I know. But there we go, were it awfully start to look like a conspiracy. Some thing about who owns the banks and the news. Is my government trying to set up, black against white. Divide and conquer ? Last few days only, 3 anti- lockdown and anti law change ...