void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(1, INPUT_PULLUP);
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(4, INPUT_PULLUP);


}

void loop() {
 if (digitalRead(1)==0){
  Serial.println("hola");
  delay(500);
 }
  else{
    Serial.println("nada");
    delay(50);
  }
  if (digitalRead(2)==0){
  Serial.println("como");
  delay(500);
  }
  if (digitalRead(3)==0){
  Serial.println("estas");
  delay(500);
  }
  if (digitalRead(4)==0){
  Serial.println("hoy");
  delay(500);
  }
  
}