void setup() {
  pinMode(5, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(15, INPUT);
}

void loop() {
  if(digitalRead(15) == HIGH){
    Serial.println("Button ditekan-LED=ON");
    delay(5);
    digitalWrite(5, HIGH);
    digitalWrite(18, LOW);
    }else{
      delay(5);
      digitalWrite(5,LOW);
      digitalWrite(18, HIGH);
    }
}