const int ledPin = 13;
void setup() {
Serial.begin(9600);
pinMode(A0, INPUT);
pinMode(ledPin, OUTPUT);
}
void loop() {
  int nilai = analogRead(A0);
  if(nilai<=200){
  digitalWrite(ledPin, HIGH);
  Serial.print(nilai);
  Serial.println(" ; Gelap ; LED menyala");
  }
  else{
  digitalWrite(ledPin, LOW);
  Serial.print(nilai);
  Serial.println(" ; Terang ; LED mati");
  }
}