Codio del escudo de X 0 para arduini

XO.ino

int Led[9] = {
  0,1,2,3,4,5,6,7,8};

void setup() {

  for(byte i = 0; i<9;i++){
    pinMode(Led[i], OUTPUT);
    digitalWrite(Led[i], LOW);  
  }
  pinMode(A0, INPUT);
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(A3, INPUT);
  pinMode(A4, INPUT);
  pinMode(A5, INPUT);
  digitalWrite(A0,LOW);
  digitalWrite(A1,LOW);
  digitalWrite(A2,LOW);
  digitalWrite(A3,LOW);
  digitalWrite(A4,LOW);
  digitalWrite(A5,LOW);
  int pb = A5;
  pinMode(pb, OUTPUT);
  delay(100);
  digitalWrite(pb,LOW); 
  Serial.begin(9600);
}

void loop() {
  if(digitalRead(A0) == LOW){
    Serial.println("A0 Activo");
    delay(1000);
  }
  if(digitalRead(A1) == LOW){
    Serial.println("A1 Activo");
    delay(1000);  
  }
  if(digitalRead(A2) == LOW){

    Serial.println("A2 Activo");
    delay(1000);
  }
 
}