int led =8;
int ldr =A0; // put your setup code here, to run once:

int nilai;

void setup() {
  pinMode(led, OUTPUT);
Serial.begin(9600);

}

void loop() {
 nilai=analogRead(ldr);
 Serial.print("nilai ldr:");
 Serial.println(nilai);

 if (nilai <500){
digitalWrite(led, HIGH);
 }

else{
digitalWrite(led, LOW);
}

}