int const led = 13;
int const pushBtn = 12;

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

  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  bool btnValue = digitalRead(pushBtn);

  Serial.println(btnValue);

  if(btnValue == HIGH){
    digitalWrite(led, HIGH);
  }else{
    digitalWrite(led, LOW);
  }
}