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

ISR(INT0_vect)
		{
		PORTB|=(1<<7);
		_delay_ms(30);
		}
ISR(INT1_vect)
		{
		PORTB&=~(1<<7);
		_delay_ms(30);
		}
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)|_BV(ISC10)|_BV(ISC11); //rising edge activate INT0
		sei();


		while (1){
				PORTA=0x00;
				for (unsigned char i=0;i<8;i++)
						{
						PORTA = ~(1<<i);
						_delay_ms(500);
						}
				}
		}