#include <util/delay.h>
unsigned long t;

void setup() {
  SREG  |= 0b10000000;
  EICRA |= 0b00000011;
  EIMSK |= 0b00000001;
  DDRC  |= 0b00000001;
}

ISR(INT0_vect) {
  PORTC |= 0b00000001;
  _delay_ms(1000);
  PORTC &= 0b11111110;
}

void loop() {
  
}