#define LED_PIN 10
#define BUTTON_PIN 2

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT);
  attachInterrupt(digitalPinToInterrupt(BUTTON_PIN), blinkLed, RISING);
}

void loop() {
  digitalWrite(LED_PIN, LOW);   // turn the LED off by making the voltage LOW
  delay(5000);
}

void blinkLed() {
  digitalWrite(LED_PIN, HIGH);
}