I’ve been working on a Sketchpad recreation recently, reading through his thesis. One thing I loved is that the display scanned so slowly that if you did it li

I’ve been working on a Sketchpad recreation recently, reading through his thesis. One thing I loved is that the display scanned so slowly that if you did it linearly, or even interlaced, there was a visible strobing pattern across the screen and it gave people a headache. So he randomized the order in which lit pixels were drawn to give it a more distributed, “twinkle” like appearance.