pieces you asked about:
// translate the 24 bit color from RGB to the actual
// order used by the LED wiring. GRB is the most common.
int colorWiring(int c) {
int red = (c & 0xFF0000) >> 16;
int green = (c & 0x00FF00) >> 8;
int blue = (c & 0x0000FF);
red = gammatable[red];
Unity shows the following warning on mobile devices up to Unity 2019.4: "Please note that Unity WebGL is not currently supported on mobiles. Press OK if you wish to continue anyway." This script helps you remove this warning
To see live examples see Unity Web GL Loading Test
The script will run after the build has completed and replace the checks from all generated javascript files.