#define pinTrig 3
#define pinEcho 2
#define pinBuz 13


long waktu, jarak;








void setup() {
  // put your setup code here, to run once:

  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(10, OUTPUT);
  Serial.begin(9600);
pinMode (pinBuz, OUTPUT);
pinMode (pinTrig, OUTPUT);
pinMode (pinEcho, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:

  if (jarak <= 200 && jarak >= 2){
     digitalWrite(10, HIGH);
  delay(50);
  digitalWrite(10, LOW);
  delay(50);


  }

  if (jarak <= 250 && jarak >= 200){
     digitalWrite(8, HIGH);
  delay(50);
  digitalWrite(8, LOW);
  delay(200);


  }

  
 if (jarak <= 300 && jarak >= 250){
  digitalWrite(9, HIGH);
  delay(50);
  digitalWrite(9, LOW);
  delay(300);
 }

  digitalWrite (pinTrig, LOW);
delayMicroseconds(2);
digitalWrite (pinTrig, HIGH);
delayMicroseconds(10);
digitalWrite (pinTrig, LOW);

waktu = pulseIn(pinEcho, HIGH);
jarak = waktu / 58.2; 


if (jarak < 250 && jarak >= 200) { 
tone(pinBuz, 100);
delay (50);
noTone (pinBuz);
delay (200);
}

if (jarak < 300 && jarak >= 250) { 
tone(pinBuz, 100);
delay (50);
noTone (pinBuz);
delay (300);
}

if (jarak < 200 && jarak >= 2) { 
tone(pinBuz, 100);
delay (50);
noTone (pinBuz);
delay (50);
}

else {
  noTone(pinBuz); 
}

}