Arduino Drum Lessons

/* 
 * Version 1.0 August, 2021
 * Copyright (c) 2021 Korneel Verraes
 * https://lego-projecten.webnode.nl/
 *  
 * Bluno M3 Arduino Drum Lessons:
 * A sound sensor with digital output is connected to pin 7
 * A servo motor is connected to pin  9
 * An LED is connected to pin 13
 * 
 * Accompanying video: https://youtu.be/OXwlFxWnDI8
 */

#include <ServoM3.h>  //use this on Bluno M3
//#include <Servo.h>  //use this on other Arduino boards (e.g.: Arduino UNO, Arduino MEGA...)

Servo servo;                                      

int clapCount = 0;
int clapTime[50];
int led = 13;
int sensor = 7;
boolean clap = 0;

void setup() {
  servo.attach(9);
  servo.write(0);
  pinMode(led, OUTPUT);
  pinMode(sensor, INPUT);
}

void loop() {
  clap = digitalRead(sensor);
  if (clap == 1) {
    digitalWrite(led, HIGH);
    clapTime[clapCount] = millis();
    clapCount++;
    delay(200);
  }
  else {
    digitalWrite(led, LOW);
  }
  if ((millis() - clapTime[clapCount - 1]) > 2000 && clapCount != 0) {
    for (int i = 1; i < clapCount ; i++) {
      servo.write(13);
      delay(80);
      servo.write(0);
      delay (clapTime[i] - clapTime[i - 1] - 80); 
    }
    servo.write(13);
    delay(80);
    servo.write(0);
    delay(800);
    clapCount = 0;
  }
}