GameMaker ZX Spectrum Loading Screen

[josyanf1]

Hello! I am trying to emulate the initial loading screen of a ZX Spectrum.

I searched the internet a bit and I found this: https://marketplace.yoyogames.com/assets/154/html5-retro-loading-screen

I bought it, but apparently it is only for HTML5. Do you think there is a way to port this to Windows or GML in general?
Or do you know any way to animate this by code?

I'm a bit lost and I don't know where to start :S

Thanks in advance! <3

 

[NightFrost]

Well, just looking at the video, the basic effect itself seems relatively simple to replicate with a shader. The question is more of how much retro authenticity it should have, from duplicating the exact color pallette to how the colors jump across the screen, and how a horizontal line might change color partway across.

 

[Leif]

Look into js file
Rewrite js on gml and use as fake loading screen.
Looks like it's not so hard, I think it's just color switching.

As a direction:
1. Divide screen onto 20-30 strips of different thickness
2. Randomly change color of each strip every step