int led_1 = 1;
int led_2 = 2;
int potensio = A0;
int sudut = 0;
int pinBuzzer = 4;

void setup() {
  Serial.begin(9600);
  pinMode(led_1, OUTPUT);
  pinMode(led_2, OUTPUT);
  pinMode(pinBuzzer, OUTPUT);
}

void loop() {
  sudut = analogRead(potensio);
  Serial.print("sudut potensio = ");
  Serial.println(sudut);
  
  if(sudut > 0){
    digitalWrite(led_1, HIGH);
    digitalWrite(led_2, LOW);
    digitalWrite(pinBuzzer, LOW);
  }
  if(sudut > 500){
    digitalWrite(led_2, HIGH);
    digitalWrite(led_1, LOW);
    digitalWrite(pinBuzzer, LOW);
  }
  if(sudut > 900){
    digitalWrite(led_2, LOW);
    digitalWrite(led_1, LOW);
    digitalWrite(pinBuzzer, HIGH);
  }
  delayMicroseconds(2000);

  else{
    Serial.println("program gagal!");
  }

}