#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
ISR(INT0_vect)
{
  PORTB|=(1<<7);
   _delay_ms(7000);
}


ISR(INT1_vect)
{
  PORTB^=(1<<7);
  _delay_ms(500);
}
int main (void)
{
  DDRA=0xff;
  DDRB |=(1<<PB7);// LED output enable
  PORTD |=_BV(PD0); // pin PD.0 input pullup
  PORTD |=_BV(PD1); // pin PD.1 input pullup
  EIMSK |= (1<<INT0)|_BV(INT1);
  // enable interrupt
  EICRA |= _BV(ISC01)|_BV(ISC00); //rising edge activate INT0
  sei();
while (1){
  PORTA=0x00;
for (unsigned char i=0;i<8;i++)
{
  PORTA = ~(1<<i);
  _delay_ms(500);
}
}
}