#include <Adafruit_NeoPixel.h>
#include <FastLED.h>
CRGB leds[1];
int value =0;

void setup() {

  Serial.begin(9600);
  FastLED.addLeds<NEOPIXEL, 3>(leds, 1);

}

void loop() 
{

  value = analogRead(A0);
  Serial.print("value:");
  Serial.println(value);

  if (value>1000)
  {

    Serial.println("red");
    leds[0]=CRGB::Red;
    FastLED.show();

  }
  else if (value>500)
  {

    Serial.println("orange");
    leds[0]=CRGB::Orange;
    FastLED.show();

  }
  else
  {

    Serial.println("orange");
    leds[0]=CRGB::Green;
    FastLED.show();

  }

}