#include <ezButton.h>

// define buttons with ezButton
ezButton btn2(2);
ezButton btn3(3);
ezButton btn4(4);

// define led pin
const int ledPin = 8;

int step = 0;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  // set btn debounce time
  btn2.setDebounceTime(50);
  btn3.setDebounceTime(50);
  btn4.setDebounceTime(50);

  // led pin as output
  pinMode(ledPin, OUTPUT);

}

void loop() {
  btn2.loop();
  btn3.loop();
  btn4.loop();

  if (btn2.isPressed() && step == 1) {
    Serial.println("step 2");
    step++;
    return;
  } 

  if (btn3.isPressed() && step == 0) {
    Serial.println("step 1");
    step++;
    return;
  }

  if (btn4.isPressed() && step == 2) {
    Serial.println("success");
    digitalWrite(ledPin, HIGH);
    delay(4000);
    digitalWrite(ledPin, LOW);
  }

  if (btn2.isPressed() || btn3.isPressed() || btn4.isPressed()) {
    Serial.println("reset");
    step = 0;
    return;
  }
}