const int pushbutton = 2;
const int relay1Pin = 4;


void setup() {
  // put your setup code here, to run once:
  pinMode(pushbutton, INPUT_PULLUP);
  pinMode(relay1Pin, OUTPUT);
  digitalWrite(relay1Pin, HIGH);
}

void loop() {
  int estadoBoton = digitalRead(pushbutton);
  if(pushbutton==HIGH){
  digitalWrite(relay1Pin,LOW); // Activate relay. 
  }else {
    digitalWrite(relay1Pin,HIGH);  // Release the relay. 
  }
  
   
}