This reminds of old ZX Spectrum computers that had 48K RAM of which ~4K was the buffer containing what was actually shown on the screen.
Some software was so space-constrained that when loading, it would temporarily have to write into the screen buffer, so when you loaded something it may have filled the screen with images similar to those of this tool. Then as loading completed, it would shuffle things around in memory to be able to use the screen for its intended purpose.