#include <Adafruit_NeoPixel.h>

#define PIN 6
#define NUMPIXELS 16

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  pixels.begin(); // Initialize NeoPixel library
}

void loop() {
  for (int i = 0; i < NUMPIXELS; i++) {
    pixels.setPixelColor(i, pixels.Color(255, 0, 0)); // Red color
    pixels.show(); // Update the ring
    delay(100);
    pixels.setPixelColor(i, 0); // Turn off the pixel
  }
}