const byte ledPin = 13;
const byte interruptPin = 2;
volatile byte state = LOW;
int botten = 1;

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

void loop() {
  if (state)
      digitalWrite(13, LOW);
  else 
   digitalWrite(13 ,HIGH);
   delay(1000);
   



}

void blink() {
  state = !state;
  
}