So all these years I thought a GIF image is limited to a maximum of 256
colors. This nice
article (in czech :/) explains there is something called local palettes.
Instead of having a global image palette, you can define a palette per
frame. So it is possible to ‘assemble’ an image out of all these 256
Some software, such as firefox apparently doesn’t interp[ret the 0
milisicond delay properly so you get a nice ZX Spectrum like load effect
(perhaps a CPU safety feature).