#include <Adafruit_NeoPixel.h>
int neopixelpin = 9;
int noofled = 16;
Adafruit_NeoPixel ring = Adafruit_NeoPixel(noofled,neopixelpin);
int ldr = 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);
  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 < noofled; i++){
    ring.setPixelColor(i,col);
    ring.show();
    delay(500);
  }
}