#include <Adafruit_NeoPixel.h>
#define PIN 6
#define NUMPIXELS 16

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

void setup() {  
  pixels.begin();
  pixels.show();
}

void loop() {
  for(int i = 0; i < NUMPIXELS; i++) {
    pixels.setPixelColor(i, pixels.Color(255, 0, 0));
    pixels.show();
    delay(50);
  }
  for(int i = 0; i < NUMPIXELS; i++) {
    pixels.setPixelColor(i, pixels.Color(0, 255, 0));
    pixels.show();
    delay(50);
  }
  for(int i = 0; i < NUMPIXELS; i++) {
    pixels.setPixelColor(i, pixels.Color(0, 0, 255));
    pixels.show();
    delay(50);
  }
}