void setup() {
  // put your setup code here, to run once:
  for(char x=0;x<8;x++){
    pinMode(x, OUTPUT);
  }
}

char auto_fant[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};

void loop() {
  // put your main code here, to run repeatedly:
  for(char x=0;x<8;x++){
    digitalWrite(x, HIGH);
  }
  delay(500);
  for(char x=0;x<8;x++){
    digitalWrite(x, LOW);
  }  
  delay(500);  
}