#define LED_RED 13
const int pinButton = 8;

void setup() {
  // put your setup code here, to run once:
  pinMode(LED_RED, OUTPUT);
  pinMode(pinButton, INPUT);

}

void loop() {
  int estado = digitalRead(pinButton);
  if(estado == LOW){
    digitalWrite(LED_RED, HIGH);
  } else {
    digitalWrite(LED_RED, LOW);
  }
  // put your main code here, to run repeatedly:

}