This pre-rendered video shows the effect I want to simulate in code, in https://scratch.mit.edu/projects/142864962/ (It may be a couple of nights until I finish off that code.) There's also an old project on the net called Drivey that uses simplified graphics like this which I'ld like it to look like too.
Thanks to @VGB-Games for the animation. I just reversed the direction and removed the cars.
