int LED = 6;
int LED1 = 8;
int LED2 = 10;
int buzzer = 4;
const int ldr = A0;

void setup() {
Serial.begin(9600);
pinMode(LED, OUTPUT);
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(buzzer, OUTPUT);
pinMode(ldr, INPUT);
}
// FUNCTION 1 UNTUK SET LED
void ledBlink (int speed){
  digitalWrite(LED,1);
  delay(speed);
  digitalWrite(LED,0);

  digitalWrite(LED1,1);
  delay(speed);
  digitalWrite(LED1,0);

  digitalWrite(LED2,1);
  delay(speed);
  digitalWrite(LED2,0);
}
// FUNCTION 1 UNTUK SET BUZZER
void sound(int speed,int freq){
  tone(buzzer,freq);
  delay(speed);
  noTone(buzzer);
}

void loop() {
int sensor_value = analogRead(A0);
if (sensor_value > 100){
ledBlink(500);
sound(500,700);
}
}