#include <Adafruit_NeoPixel.h>
#define PIN 7
#define NUM_LEDS 16
Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRB + NEO_KHZ800);
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  strip.begin();
  strip.show();
  Serial.println("hello Arduino Nano");
}

void loop() {
  // put your main code here, to run repeatedly:
  for(int i = 0; i<16; i++)
  {
    strip.setPixelColor(i, 255, 0, 0);
    strip.show();
    //delay(50);    
  }
  delay(500);
  for(int i = 0; i<16; i++)
  {
    strip.setPixelColor(i, 0, 255, 0);
    strip.show();
    //delay(50);    
  }
  delay(500);
  for(int i = 0; i<16; i++)
  {
    strip.setPixelColor(i, 0, 0, 255);
    strip.show();
    //delay(50);    
  }
  delay(500);
  for(int i = 0; i<16; i++)
  {
    strip.setPixelColor(i, 255, 255, 255);
    strip.show();
    //delay(50);    
  }
  delay(500);
  for(int i = 0; i<16; i++)
  {
    strip.setPixelColor(i, 0, 255, 255);
    strip.show();
    //delay(50);    
  }
  delay(500);
}