Slightly OT, but when I was doing my computing GCSE we used Research Machines RML480Z gear for coding, I wrote some safe cracking game, the high point of which (git me an A!) was its revolutionary animated graphics. They were essentially vectors and because the machine was too slow to calculate transforms on the fly I had to draw everything on graph paper, colour each grid cell and then type it into a very long DATA statement.
I'd managed to forget about all of this but when I was looking at the photo and reading your explanation the big long strings of DATA statements came flooding back
Cool wall dude!