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

int main (void) 
{ 						

	DDRB = 0xff; 		
	 					

	while(1) 
		{

		_delay_ms(1000);
		
		
		PORTB = 0x03;
	
		_delay_ms(1000);
		
		PORTB= 0x00;
			
					 	
		} 
						


	return 0; 		
}