void setup() {
  Serial.begin (9600);
  pinMode(A4,INPUT);
  Serial.println("WELCOME TO MY PROJECT");
  Serial.println("MENAMPILKAN DATA LDR KE SERIAL");
  delay(2000);

}

void loop() {
 wadah = analogRead(A4);
 Serial.print("DATA LDR = ");
 Serial.println(wadah);
 delay(100);

}