void setup() {
  pinMode(2, OUTPUT);
	pinMode(3, OUTPUT);
	pinMode(4, OUTPUT);
	pinMode(5, OUTPUT);
	pinMode(6, OUTPUT);
	pinMode(7, OUTPUT);
	pinMode(8, OUTPUT);
	pinMode(9, OUTPUT);
}

void loop() {
	digitalWrite(2, HIGH);
  delay(100);
  digitalWrite(2, LOW);
	digitalWrite(3, HIGH);
	delay(100);
  digitalWrite(3, LOW);
	digitalWrite(4, HIGH);
	delay(100);
  digitalWrite(4, LOW);
	digitalWrite(5, HIGH);
	delay(100);
  digitalWrite(5, LOW);
	digitalWrite(6, HIGH);
	delay(100);
  digitalWrite(6, LOW);
	digitalWrite(7, HIGH);
	delay(100);
  digitalWrite(7, LOW);
	digitalWrite(8, HIGH);
	delay(100);
  digitalWrite(8, LOW);
	digitalWrite(9, HIGH);
	delay(100);
  digitalWrite(9, LOW);
	digitalWrite(8, HIGH);
  delay(100);
  digitalWrite(8, LOW);
	digitalWrite(7, HIGH);
	delay(100);
  digitalWrite(7, LOW);
	digitalWrite(6, HIGH);
	delay(100);
  digitalWrite(6, LOW);
	digitalWrite(5, HIGH);
	delay(100);
  digitalWrite(5, LOW);
	digitalWrite(4, HIGH);
	delay(100);
  digitalWrite(4, LOW);
	digitalWrite(3, HIGH);
	delay(100);
  digitalWrite(3, LOW);
	digitalWrite(2, HIGH);
	delay(100);
  digitalWrite(2, LOW);
}