// const int buttonPin = 2; // the number of the pushbutton pin
// const int ledPin = 13; // the number of the LED pin
// // variables will change:
// int buttonState = 0; // variable for reading the pushbutton status
// void setup() {
//   // initialize the LED pin as an output:
//   pinMode(ledPin, OUTPUT);
//   // initialize the pushbutton pin as an input:
//   pinMode(buttonPin, INPUT);
// }
// void loop() {
//   // read the state of the pushbutton value:
//   buttonState = digitalRead(buttonPin);
//   // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
//   if (buttonState == HIGH) {
//     // turn LED on:
//     digitalWrite(ledPin, HIGH);
//   } else {
//     // turn LED off:
//     digitalWrite(ledPin, LOW);
//   }
// }

// const byte ledPin = 13;
// const byte interruptPin = 2;
// volatile byte state = LOW;

// void setup() {
//   pinMode(ledPin, OUTPUT);
//   pinMode(interruptPin, INPUT_PULLUP);
//   attachInterrupt(digitalPinToInterrupt(interruptPin), blink, CHANGE);
// }

// void loop() {
//   digitalWrite(ledPin, state);
// }

// void blink() {
//   state = !state;
// }

int flag = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(13, OUTPUT);
  attachInterrupt(digitalPinToInterrupt(2), turnonled, RISING);

}


void turnonled()
{
  flag = 1;

}

void loop() {

  if (flag == 0) {
    digitalWrite(13, LOW);
  } else {
    digitalWrite(13, HIGH);
    delay(5000);
    flag = 0;
  }
}