Okay, so your blueprint example looks neat and clean, so thank you for that nudge. However, I tried to translate it into my blueprint and things still do not turn out as good as yours. Maybe the difference is because of you using a static actor and I use Blueprint->Actor? I don’t know, I’m new.
Here’s my current setup and result. The weird thing is, there are 4 blocks spawned and only 2 gaps show, so one of the blocks must be spawning correctly or is spawning through another one. I hope you can see what I did wrong.