WS2812B LED strip and ESP8266 shows wrong colors

Just FYI in the new 1v95, the neopixel module is not part of esp8266, usage is like any other Espruino platform:

// flash an 8 LED neopixel array in a rainbow pattern
var led_count = 8;
var neoPin = NodeMCU.D4;

var rgb = new Uint8ClampedArray(led_count * 3);
var pos = 0;

function getPattern() {
  pos++;
  for (var i=0;i<rgb.length;) {
    rgb[i++] = (1 + Math.sin((i+pos)*0.1324)) * 127;
    rgb[i++] = (1 + Math.sin((i+pos)*0.1654)) * 127;
    rgb[i++] = (1 + Math.sin((i+pos)*0.1)) * 127;
  }
  return rgb;
}
setInterval(function() {
  require("neopixel").write(neoPin, getPattern());
}, 100);