Simulate a ZX-Spectrum (8 bit machine!) screen loading using JavaScript

[codeguppy]

Did you use any 8 bit computer like Commodore 64, Apple II, ZX-Spectrum?
Those were fun machines!

Remember those times with this small JavaScript program that simulates how a ZX-Spectrum used to load a screen… 6912 bytes in length!

https://codeguppy.com/code.html?t=zx_animated