#include <ezButton.h>

/// constants won't change
ezButton button1(7);  // create ezButton object that attach to pin 7;
ezButton button2(8);  // create ezButton object that attach to pin 8;

// variables will change:
int ledState1 = LOW;   // the current state of LED
int ledState2 = LOW;   // the current state of LED

void setup() {
  Serial.begin(9600);         // initialize serial
  pinMode(3, OUTPUT);   // set arduino pin to output mode
  pinMode(4, OUTPUT);   // set arduino pin to output mode
  button1.setDebounceTime(50); // set debounce time to 50 milliseconds
  button2.setDebounceTime(50); // set debounce time to 50 milliseconds
}

void loop() {
  button1.loop(); // MUST call the loop() function first
  button2.loop(); // MUST call the loop() function first

  if(button1.isPressed()) {
    Serial.println("The button is pressed");

    // toggle state of LED
    ledState1 = !ledState1;

    // control LED arccoding to the toggleed sate
    digitalWrite(3, ledState1); 
  }
  if(button2.isPressed()) {
    Serial.println("The button is pressed");

    // toggle state of LED
    ledState2 = !ledState2;

    // control LED arccoding to the toggleed sate
    digitalWrite(4, ledState2); 
  }
}