#define INTERRUPT_PIN PCINT1  // This is PB1 per the schematic
#define INT_PIN PB1           // Interrupt pin of choice: PB1 (same as PCINT1) - Pin 6
#define LED_PIN PB4           // PB4 - Pin 3
#define PCINT_VECTOR PCINT0_vect      // This step is not necessary - it's a naming thing for clarit

void setup() {
  pinMode(LED_PIN, OUTPUT);
  //cli();                            // Disable interrupts during setup
  PCMSK = bit(PB1); //(1 << INTERRUPT_PIN);    // Enable interrupt handler (ISR) for our chosen interrupt pin (PCINT1/PB1/pin 6)
  GIMSK |= bit(PCIE); //(1 << PCIE);             // Enable PCINT interrupt in the general interrupt mask
  //pinMode(INT_PIN, INPUT_PULLUP);   // Set our interrupt pin as input with a pullup to keep it stable
  sei();                            //last line of setup - enable interrupts after setup
}

// This is the interrupt handler called when there is any change on the INT_PIN
// ISR is defined in the headers - the ATtiny85 only has one handler

ISR(PCINT_VECTOR)
{
  if( digitalRead(INT_PIN) == LOW ) {
    digitalWrite(LED_PIN, HIGH);
  }else{
    digitalWrite(LED_PIN, LOW);
  }
}
void loop()

{



}