#include <avr/interrupt.h>
#include <avr/io.h>

uint8_t stanje=0xff;

int main(void)
{
	DDRA=0xff;
	PORTA=0xff;

	MCUCR=1<<ISC01 | 1<<ISC00;
	GICR=1<<INT0;

	// ~2ms interval
	TCCR0= 1<<WGM01 | 1<<CS02 | 1<<CS00;
	OCR0=15;

	sei();


    while(1)
    {
        //TODO:: Please write your application code
    }
}

ISR(INT0_vect) {
	GICR=0;
	TIMSK=1<<OCIE0;
	stanje=~stanje;
	PORTA=stanje;
}

ISR(TIMER0_COMP_vect) {
	static uint8_t y_old=0, flag=0;
	uint8_t temp;

	temp=y_old>>2;
	y_old=y_old-temp;

	if(bit_is_clear(PIND, PD2)) {
		y_old=y_old+0x3f;
	}

	if(y_old>0xF0 && flag==0) {
		flag=1;
		GIFR|=0b10000000;
		TIMSK=0;
		GICR=1<<INT0;
	}
	if(y_old>0xF0 && flag==1) {
		flag=0;
		TIMSK=0;
		GIFR|=0b10000000;
		GICR=1<<INT0;
	}


}