void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(12,INPUT);
}
boolean flag = false;
void loop() {
  // put your main code here, to run repeatedly:

while(flag == false){
Serial.println("mama huevo");
delay(500);
flag = digitalRead(12);

}
while(flag == true){
Serial.println("digo glu glu ");
delay(500);
flag = digitalRead(12);

}
}