#include <ezButton.h> // ezButton library
#include <ezOutput.h> // ezOutput library

ezButton button(7); // create ezButton object that attach to pin 7;
ezOutput led(9);    // create ezOutput object that attach to pin 9;

unsigned long lastCount = 0;

void setup() {
  Serial.begin(9600);
  button.setDebounceTime(50); // set debounce time to 50 milliseconds
  button.setCountMode(COUNT_FALLING);
}

void loop() {
  button.loop(); // MUST call the loop() function first
  led.loop(); // MUST call the led1.loop() function in loop()

  unsigned long count = button.getCount();
  if (count != lastCount) {
    Serial.println(count);

    if ((count % 3) == 0)
      led.blink(1000, 1000, 0, 6); // 0 milliseconds OFF, 100 milliseconds ON, start immediately,
                                   // since toggle times is 6. it changes: OFF -> ON, ON -> OFF 6 times <=> blink 3 time

    lastCount = count;
  }
}