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

void display(int bits) {
  PORTB = bits;
  _delay_ms(500);

}

int main () {
  DDRB = 0xff;                   
  display(0b00111111);      

  while(1) {
      display(0b00000001;);                       
      _delay_ms(600000);
  }
}