#include "Adafruit_NeoPixel.h"
#define PIN            2
#define NUMPIXELS      4
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  pixels.setBrightness(125);
  pixels.begin();
}

void loop() {
  for (int i = 0; i < 4; i++) {
    pixels.setPixelColor(i, pixels.Color(random(0,100),random(0,255),(random(100,200))));
    pixels.show();
  }
  delay(100);
}