int ledM = 13;
int ledK = 12;
int ledH = 11;
const int trigpin = 10;
const int echopin = 9;
long timer;
int jarak;

void setup() {
  pinMode (ledM, OUTPUT);
  pinMode (ledK, OUTPUT);
  pinMode (ledH, OUTPUT);
  pinMode (trigpin, OUTPUT);
  pinMode (echopin, INPUT);
  // put your setup code here, to run once:
}

void loop() {
  digitalWrite (trigpin, LOW);
  delayMicroseconds (2);
  digitalWrite (trigpin, HIGH);
  delayMicroseconds (10);
  digitalWrite (trigpin, LOW);
  timer = pulseIn(echopin, HIGH);
  jarak = timer/58;
  delay (200);

  if (jarak > 300){
    digitalWrite (ledM, HIGH);
  }else{
    digitalWrite (ledM, LOW);
  // put your main code here, to run repeatedly:
}

if (jarak > 200){
  digitalWrite (ledK, HIGH);
}else{
  digitalWrite (ledK, LOW);
}

if (jarak > 100){
  digitalWrite (ledH, HIGH);
}else{
  digitalWrite (ledH, LOW);
}
}