GML Script for changing the color of a DS4 gamepad. Will likely only function on PS4. Will return true upon completion of the color change.

gamepad_color

///gamepad_color(device,color,time)
var device = argument0;
var color = argument1;
var time = argument2; //(use something like .01)

if color != global.gpColor
{
    var led = merge_color(global.gpColor,color,global.gpColorFader)
    global.gpColorFader += time;
    gamepad_set_color(device,led)
    if global.gpColorFader >= 1
    {
        alert("Gamepad Color finished",0)
        global.gpColorFader = 0;
        global.gpColor = color;
        return true;
    }
}