#include <Adafruit_NeoPixel.h>
int Neopixel_PIN = 9;
int N_LEDS = 16;
Adafruit_NeoPixel ring = Adafruit_NeoPixel(N_LEDS, Neopixel_PIN);
int LDR_PIN = A0;
int value = 0;

void setup() {
  // put your setup code here, to run once:
  ring.begin();
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  value = analogRead(LDR_PIN);
  Serial.println(value);
  if(value>1000){
    Serial.println("Red");
    set_color(ring.Color(255, 0, 0));
  }
  else if(value>500){
    Serial.println("Yellow");
    set_color(ring.Color(255, 255, 0));
  }
  else{
    Serial.println("Green");
    set_color(ring.Color(0, 255, 0));
  }
}
int set_color(uint32_t col){
  for(int i=0; i<N_LEDS; i++){
    ring.setPixelColor(i, col);
    ring.show();
    delay(500);
  }
}