int LED = 14;
int btn = 25;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("B17-Teguh Kurniawan");
  pinMode(LED, OUTPUT);
  pinMode(btn, INPUT_PULLUP);
  digitalWrite(LED, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(btn) == LOW){
    digitalWrite(LED, HIGH);
    Serial.println("LAMPU MENYALA");
  } else {
    digitalWrite(LED, LOW);
    Serial.println("LAMPU MATI");
  }
  delay(1000);
}