#include <Adafruit_NeoPixel.h>

Adafruit_NeoPixel rgb_display_10 = Adafruit_NeoPixel(12,10,NEO_GRB + NEO_KHZ800);

void setup(){
  rgb_display_10.begin();
}

void loop(){
  for (int i = 1; i <= 12; i = i + (1)) {
    rgb_display_10.setPixelColor((i)-1, ((((i * 21) & 0xffffff) << 16) | ((0 & 0xffffff) << 8) | 0));
    rgb_display_10.show();
    delay(200);
    rgb_display_10.setPixelColor((i)-1, (0xffff00));
    rgb_display_10.show();
    delay(200);
  }
}

import machine
import neopixel
import time

rgb = neopixel.NeoPixel(machine.Pin(2), 12)
while True:
  for i in range(0, 12, 1):
    rgb[i] = (100, 0, 0)
    rgb.write()
    time.sleep(1)
  for i in range(0, 12, 1):
    rgb[i] = (0, 0, 0)
    rgb.write()
    time.sleep(1)