#include <ezButton.h>
#define RESET_PIN    3
#define LED_PIN1     4
#define LED_PIN2     5
#define LED_PIN3     6
#define LED_PIN4     7
ezButton button(2);  // create ezButton object that attach to pin 7;
unsigned long lastCount = 0;
unsigned long count = 0;

void setup() {
  Serial.begin(9600);
  button.setDebounceTime(50); // set debounce time to 50 milliseconds
  button.setCountMode(COUNT_FALLING);
   pinMode(LED_PIN1, OUTPUT);
   pinMode(LED_PIN2, OUTPUT);
   pinMode(LED_PIN3, OUTPUT);
   pinMode(LED_PIN4, OUTPUT);
   pinMode(RESET_PIN, OUTPUT);
  
   void(* resetFunc) (void) = 0; 
}

void loop() {
  button.loop(); // MUST call the loop() function first

  count = button.getCount();

  if (count != lastCount) {
    Serial.println(count);
    digitalWrite(RESET_PIN, HIGH);
    int countIn3 = count % 5 + 1;

    switch (countIn3) {
      case 1:
        digitalWrite(LED_PIN1, HIGH);// TO DO TASK 1
        break;

      case 2:
        digitalWrite(LED_PIN2, HIGH);// TO DO TASK 2
        break;

      case 3:
        digitalWrite(LED_PIN3, HIGH);// TO DO TASK 3
        break;

      case 4:
        digitalWrite(LED_PIN4, HIGH);// TO DO TASK 3
        break;
      case 5:
        digitalWrite(RESET_PIN, LOW);
        break;
    }

    lastCount = count;
  }
}