boolean running = false;

void setup() {
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
  pinMode(A1, INPUT_PULLUP);
  pinMode(A2, INPUT_PULLUP);
  pinMode(A3, INPUT_PULLUP);
  digitalWrite(11, 1);
  digitalWrite(12, 1);
  digitalWrite(13, 1);
}

void loop() {
if (digitalRead(A1) == 0){
  digitalWrite(13, 0);
  digitalWrite(12, 1);
  digitalWrite(11, 1);
  delay(300);
  }

 if (digitalRead(A2) == 0){
  digitalWrite(13, 1);
  digitalWrite(12, 0);
  digitalWrite(11, 1);
  delay(300);
    }
  
  
  if (digitalRead(A3) == 0){
  digitalWrite(13, 1);
  digitalWrite(12, 1);
  digitalWrite(11, 0);
  delay(300);
}
}

  
  // put your main code here, to run repeatedly: