/*
 * zadanie3.c
 *
 * Created: 22.10.2015 11:45:17
 *  Author: d14valicek
 */ 

#define F_CPU 1000000UL
#include <avr/io.h>
#include <util/delay.h>

int main(void)
{
	DDRD = 0xFF;
    while(1)
    {
        for(int c = 1; c <= 256; c=(c*2))
		{
			int a = c - 1;
			PORTD =~a;
			_delay_ms(500);
		}
	
		for(int c = 256; c >= 1; c=(c/2))
		{
			int a = c - 1;
			PORTD = ~a;
			_delay_ms(500);
		}
    }
	
	return 0;
}