void setup() {
  // put your setup code here, to run once:
 pinMode(9, OUTPUT);
 pinMode(10, OUTPUT);
 pinMode(8, OUTPUT);
 pinMode(2, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:

  if (digitalRead(2) == 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);

  }
    
}