Fade VU Meter

#include <Adafruit_NeoPixel.h>
#include <FastLED.h>

#define NUM_LEDS 30
#define LED_PIN 6
#define POWER_LED 9
#define ANALOG_READ 0
#define KNOB_PIN  A1
#define KNOB2_PIN A3

int sensorPin = A0;
int sensorValue = 0;
int vum = 0;
int ran = 0;
int fst = 0;
int measur = 0;
int up = 0;
int dw = 0;
float lgh = 0;
float hlf = 0;
unsigned int Time_Delay = 0;
unsigned int Real_Time_Delay = 0;
unsigned int Last_Time_Delay = 0;
unsigned int Real_Time_White = 0;
float knob = 1023.0;
float knob2 = 1023.0;
int pik = 0;
int fls = 351;
int wtf = 0;
int spr = 0;
float gnt = 0;
int wts;
int k;
int nrl;
int r;
int g;
int b;
int llgh;
int odc;
int adc = 0;
int adj;
int brlg;

Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.show();
  Serial.begin (28800);
  randomSeed(analogRead(A2));
  pinMode(POWER_LED, OUTPUT);
  Reset();
  Srednia();
}
void Srednia() {
  for (int i = 0; i < 10; i++) {
    odc = analogRead (sensorPin);
    adc = (adc + odc);
    adj = (adc / 10);
  }
}
void Sprawdz() {
  sensorValue = analogRead (sensorPin);
  knob = analogRead(KNOB_PIN) / 1023.0;
  measur = (sensorValue - adj);
  fst = abs(measur);
  gnt = (knob * 350);
  vum = ((fst * NUM_LEDS) / gnt);
  lgh = vum;
  hlf = (lgh / 2);
  knob2 = analogRead(KNOB2_PIN) / 1023.0;
  nrl = 255 * knob2;
}
void RandomWhite() {
  Reset();
  Last_Time_Delay = millis();
  while (Real_Time_White < fls) {
    Sprawdz();
    strip.setBrightness(nrl);
    lgh = (lgh * 2);
    if ((lgh >= (NUM_LEDS - 1)) && (fls < 2000)) {
      fls = (fls + 351);
      //Serial.println(lgh);
    }
    //Serial.println(lgh);
    ran = random(1, NUM_LEDS);
    Serial.println(lgh);
    strip.setPixelColor(ran, 255, 255, 255);
    strip.show();
    delay(40);
    strip.setPixelColor(ran, 0, 0, 0);
    strip.show();
    Time_Delay = millis();
    Real_Time_White = (Time_Delay - Last_Time_Delay);
    wtf = (fls - Real_Time_White);
    if (wtf <= 0)
    {
      Real_Time_Delay = 0;
      AllWhite();
      delay(50);
      VU_Meter();
    }
    //Serial.println(wtf);
  }
}
void Reset() {
  for (int i = 0; i < NUM_LEDS; i++) {
    strip.setPixelColor(i, 0, 0, 0);
  }
  strip.show();
}
void AllWhite() {
  for (int i = 0; i < NUM_LEDS; i++) {
    strip.setPixelColor(i, 255, 255, 255);
  }
  strip.show();
}
int MidPoint(int n) {
  int sat;
  sat = (n / 2);
  return (sat);
}
void VU_Meter() {
  for (k = 0; k < 765; k++) {
    //    Serial.println(lgh);
    Last_Time_Delay = millis();
    Sprawdz();
    strip.setBrightness(nrl);
    //Serial.println(lgh);
    if ((Real_Time_Delay >= 1000) && (lgh > NUM_LEDS)) {
      RandomWhite();
    }
    else
    {
      while (Real_Time_Delay < 1000) {
        Sprawdz();
        strip.setBrightness(nrl);
        int n = MidPoint(NUM_LEDS);
        dw = (n - hlf);
        up = (n + hlf);
        for (int z = dw; z < up; z++) {
          if (llgh > lgh) {
            for (int x = 0; x < dw; x++) {
              strip.setPixelColor(x, 0, 0, 0);
            }
            for (int c = up; c < NUM_LEDS; c++) {
              strip.setPixelColor(c, 0, 0, 0);
            }
            strip.show();
            delay(1);
          }
          if (k < 255) {
            strip.setPixelColor(z, k, 0, 255 - k);
            strip.show();
          }
          else if (k < 510) {
            strip.setPixelColor(z, 510 - k, k - 255, 0);
            strip.show();
          }
          else if (k < 765) {
            strip.setPixelColor(z, 0, 765 - k, k - 510);
            strip.show();
          }
        }
        llgh = lgh;
        delay(5);
        Time_Delay = millis();
        Real_Time_Delay = (Time_Delay - Last_Time_Delay);
        wts = (1000 - Real_Time_Delay);
        //Serial.println(Time_Delay);
      }
    }
    Sprawdz();
    strip.setBrightness(nrl);
    if (lgh > NUM_LEDS) {
      RandomWhite();
    }
    else
    {
      Serial.println(lgh);
      int n = MidPoint(NUM_LEDS);
      dw = (n - hlf);
      up = (n + hlf);
      for (int z = dw; z < up; z++) {
        if (llgh > lgh) {
          for (int x = 0; x < dw; x++) {
            strip.setPixelColor(x, 0, 0, 0);
          }
          for (int c = up; c < NUM_LEDS; c++) {
            strip.setPixelColor(c, 0, 0, 0);
          }
          delay(1);
          strip.show();
        }
        if (k < 255) {
          strip.setPixelColor(z, k, 0, 255 - k);
          strip.show();
        }
        else if (k < 510) {
          strip.setPixelColor(z, 510 - k, k - 255, 0);
          strip.show();
        }
        else if (k < 765) {
          strip.setPixelColor(z, 0, 765 - k, k - 510);
          strip.show();
        }
      }
      llgh = lgh;
      delay(5);
    }
  }
}
void loop() {
  fls = 351;
  Real_Time_White = 0;
  Sprawdz();
  VU_Meter();
  delay(5);
}