#include <Adafruit_NeoPixel.h>
int no=16;
int pin=12;

Adafruit_NeoPixel ring = Adafruit_NeoPixel(no,pin);

void setup() {
  // put your setup code here, to run once:
  ring.begin();
}

void loop() {
  // put your main code here, to run repeatedly:
  for(int i=0;i<no;i++){
    ring.setPixelColor(i,ring.Color(0,0,225));
    ring.show();
    delay(500);
    if(i<8){
    ring.setPixelColor(i,ring.Color(0,225,0));
    ring.show();
    delay(500);
    }
    else{
    ring.setPixelColor(i,ring.Color(225,0,0));
    ring.show();
    delay(500);
    }
  }
}