If you've never done this before, you'll love it... i hope
Back in the 80s, at school, we had the wonderful Acorn [who went on to become ARM] "BBC" Machines... the BBC Model A and B...
later superseded by the BBC Master series machines [of which I have two here in my flat, whoo get me and my retro stuff ]
amazing machines for their time, a gazillion and one external output ports for connecting analogue devices and parallel processors n stuff. anyway, one of the wonderful things about the BBC Basic was the often missed VDU command, which could be used in certain graphical modes to