int led = 7;           // LED TILL DIMMER; OBS ÄNDRA TILL SPECIFICIC.
int brightness = 0;    // how bright the LED is
int fadeAmount = 5;    // how many points to fade the LED by
int avknapp= 2;
volatile int state =LOW;

// the setup routine runs once when you press reset:
void setup() {
  // deklarerar 7an
  pinMode(led, OUTPUT);
  pinMode(avknapp, INPUT);
  attachInterrupt(digitalPinToInterrupt(avknapp),off, CHANGE);
}


void loop(){

 if(state==LOW){

  analogWrite(led, brightness);


  brightness = brightness + fadeAmount;


  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;                    // obs kan vara 1023 som är max, testa imorgon
  }

  delay(30);
} else{ analogWrite(led, 0);  }
}

void off(){
  if(state==LOW){ state = HIGH; }
   else{ state = LOW; }


}