void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(7,INPUT_PULLUP);
  pinMode(3, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (digitalRead(7)) {
    Serial.println("Tralalero Tralala");
    digitalWrite(3, LOW);
  } else {
    Serial.println("Hiiiii");
    digitalWrite(3, HIGH);
  }
}