Led Strip

#include <FastLED.h>

#define NUM_LEDS 8
#define LED_PIN 6
#define LED_TYPE WS2812
#define COLOR_ORDER GRB
#define ANALOG_READ 0
CRGB led[NUM_LEDS];

#define BRIGHTNESS 28
#define FRAMES_PER_SECOND 120

int sensorPin = A0;
int sensorValue = 0;
int vum = 0;
int measur = 0;

void setup() {
  FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(led, NUM_LEDS).setCorrection(TypicalLEDStrip);
  FastLED.setBrightness(BRIGHTNESS);
  Serial.begin (28800);
}
void AllWhite() {
  for (int i = 0; i < NUM_LEDS; i++) {
    led[i] = CRGB(255, 255, 255);
  }
  FastLED.show();
}
void Reset() {
  for (int i = 0; i < NUM_LEDS; i++) {
    led[i] = CRGB(0, 0, 0);
  }
  FastLED.show();
}

void loop() {
  for (int i = 0; i < 256; i++) {
    sensorValue = analogRead (sensorPin);
    measur = (sensorValue-350);
    vum = ((measur * NUM_LEDS) / 765);
    Serial.println(measur);
   if (sensorValue < 765)
    {
      fill_rainbow(led, vum, i);
      FastLED.show();
      Reset();
    }
    else
    {
      Reset();
      AllWhite();
      delay(50);
      Reset();
    }
    delay(8);
  }
}