int trig = 27;
int echo = 26;
int distance;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(trig, OUTPUT);
  pinMode(echo,INPUT);
  pinMode(13,OUTPUT);
  pinMode(33, OUTPUT);
  pinMode(12, OUTPUT);
  Serial.println("Hello, ESP32!");
}

void loop() {
  digitalWrite(trig, HIGH);
  delay(100);
  digitalWrite(trig, LOW);
  int reading = pulseIn(echo,HIGH);
  distance = (reading*0.034/2);
  Serial.println(distance);
  if(distance>300)
 {
   digitalWrite(12, HIGH);
  digitalWrite(13, LOW);
  digitalWrite(33, LOW);
 }
  else if(distance>200)
  {digitalWrite(13, HIGH);
  digitalWrite(33, LOW);
  digitalWrite(12, LOW);
  }
  else 
 {
   digitalWrite(33, HIGH);
  digitalWrite(13, LOW);
  digitalWrite(12, LOW);
  }
  // put your main code here, to run repeatedly:
 // this speeds up the simulation
}