void setup() {
  // put your setup code here, to run once:
DDRD= B11111111;
PORTD=B00000001;
}

void loop() {
  // put your main code here, to run repeatedly:
 if (PORTD == B10000000){
 PORTD=B00000001;
 delay(1000);
}
PORTD=PORTD << 1;
delay(1000);
}