void setup() {
  // put your setup code here, to run once:
  // pinMode(8, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  // digitalWrite(8,HIGH);
  // delay(1000);
  // digitalWrite(8,LOW);
  // delay(1000);

  digitalWrite(8, HIGH);
  delay(200);
  digitalWrite(8, LOW);
  digitalWrite(9, HIGH);
  delay(200);
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH);
  delay(200);
  digitalWrite(10, LOW);
  digitalWrite(10, HIGH);
  delay(200);
  digitalWrite(10, LOW);
  digitalWrite(9, HIGH);
  delay(200);
  digitalWrite(9, LOW);
  digitalWrite(8, HIGH);
  delay(200);
  digitalWrite(8, LOW);

}