Dancing water speaker

#include "arduinoFFT.h"
 
#define SAMPLES 128             //Must be a power of 2     // 2^7
#define SAMPLING_FREQUENCY 1000 //Hz, must be less than 10000 due to ADC
 
arduinoFFT FFT = arduinoFFT();
 
unsigned int sampling_period_us;
unsigned long microseconds;
 
double vReal[SAMPLES];
double vImag[SAMPLES];

int ledPin = 13;      // select the pin for the LED
int ledPinGND = 8;      // select the pin for the LED
int ledPinG = 9;      // select the pin for the LED
int ledPinR = 10;      // select the pin for the LED
int ledPinB = 11;      // select the pin for the LED

float  tension = 0;

int pompe = 3;
 
void setup() {
    Serial.begin(115200);
 
    sampling_period_us = round(1000000*(1.0/SAMPLING_FREQUENCY));

    // declare the ledPin as an OUTPUT:
    pinMode(ledPin, OUTPUT);
  
    pinMode(ledPinR, OUTPUT);
    pinMode(ledPinG, OUTPUT);
    pinMode(ledPinB, OUTPUT);
    pinMode(ledPinGND, OUTPUT);

    pinMode(pompe, OUTPUT);
    
}
 
void loop() {

  digitalWrite(ledPinR, 0);
  digitalWrite(ledPinG, 0);
  digitalWrite(ledPinB, 0);
  digitalWrite(ledPinGND, 0);

  digitalWrite(pompe, 0);
   
    /*SAMPLING*/
    for(int i=0; i<SAMPLES; i++)
    {
        microseconds = micros();    //Overflows after around 70 minutes!
     
        vReal[i] = analogRead(0);
        vImag[i] = 0;
     
        while(micros() < (microseconds + sampling_period_us)){
        }
    }
 
    /*FFT*/
    FFT.Windowing(vReal, SAMPLES, FFT_WIN_TYP_HAMMING, FFT_FORWARD);
    FFT.Compute(vReal, vImag, SAMPLES, FFT_FORWARD);
    FFT.ComplexToMagnitude(vReal, vImag, SAMPLES);
    double peak = FFT.MajorPeak(vReal, SAMPLES, SAMPLING_FREQUENCY);
 
    /*PRINT RESULTS*/
    //Serial.println(peak);     //Print out what frequency is the most dominant.
 
    for(int i=0; i<(SAMPLES/2); i++)
    {
        /*View all these three lines in serial terminal to see which frequencies has which amplitudes*/

                if (vReal[i] > 5)
                {
                  delay(100);         // delay in between reads for stability 
                digitalWrite(pompe, 1);
                  
                digitalWrite(ledPinR, 1);
                digitalWrite(ledPinG, 0);       // define a colors
                digitalWrite(ledPinB, 0);
              
                delay(500);        // delay to change to improve the water jet

                digitalWrite(ledPinR, 0);
                digitalWrite(ledPinG, 0);
                digitalWrite(ledPinB, 0);
                
                digitalWrite(pompe, 0);
                }
                if (vReal[i] > 15)
                {
                  delay(100);         // delay in between reads for stability
                digitalWrite(pompe, 1);
                  
                digitalWrite(ledPinR, 0);
                digitalWrite(ledPinG, 1);           // define a colors
                digitalWrite(ledPinB, 0);
                
                delay(300);         // delay to change to improve the water jet
                
                digitalWrite(ledPinR, 0);
                digitalWrite(ledPinG, 0);
                digitalWrite(ledPinB, 0);
                
                digitalWrite(pompe, 0);
                }
                
                if (vReal[i] > 20)
                {
                  delay(100);      // delay in between reads for stability 
                digitalWrite(pompe, 1);
              
                digitalWrite(ledPinR, 0);
                digitalWrite(ledPinG, 0);     // define a colors
                digitalWrite(ledPinB, 1);
              
                delay(150);        // delay to change to improve the water jet

                digitalWrite(ledPinR, 0);
                digitalWrite(ledPinG, 0);
                digitalWrite(ledPinB, 0);
                
                digitalWrite(pompe, 0);
                }
                
         
        //Serial.print((i * 1.0 * SAMPLING_FREQUENCY) / SAMPLES, 1);
        //Serial.print(" ");
        Serial.println(vReal[i], 1);    //View only this line in serial plotter to visualize the bins
    }
 
    //delay(1000);  //Repeat the process every second OR:
//    while(1);       //Run code once
}