#include "delay.h"
#include <avr/interrupt.h>
volatile uint8_t flag=0;

int main(void){
timer1_init();
  DDRC |= (1<<PC0);                          // PB1 (D9)
   // prescaler 8
  DDRD &= ~(1 << PD2);
  PORTD |= (1 << PD2);
  EICRA &= ~((1 << ISC01) | (1 << ISC00));
  EIMSK |= (1<<INT0);

  sei();
  while(1){
    if(flag){

      flag=0;
    PORTC |=(1<<PC0); 
    delay_ms(500); 
    PORTC &=~(1<<PC0);
    delay_ms(500);
    }
    else{
      PORTC |=(1<<PC0);
      delay_ms(50);
      PORTC &=~(1<<PC0);
      delay_ms(50);
    }           // 75%
  }
}
ISR(INT0_vect){
  flag=1; 
}