#include <ESP32Servo.h>
#define TRIG_PIN  18  
#define ECHO_PIN  5

#define SERVO_PIN 25
#define SERVO_PIN3 27
#define DISTANCE_ultrasonservo  150 //centimetres
#define DISTANCE1 150 //centimetres
#define distance_cm2 350 //centimetres
Servo servo;
Servo servo1;
float  distance_cm,duration_us,distance_cm1,duration_us1;
int a1=0;
int a2=0;
int i=0;
int servoPos;
int xValue;

void setup() {
  Serial.begin (9600);    
  pinMode(TRIG_PIN, OUTPUT); 
  pinMode(ECHO_PIN, INPUT);  
  servo.attach(SERVO_PIN);   
  servo.write(0);
  servo1.attach(SERVO_PIN3);   
  servo1.write(0); 
  
  }

  void loop() {
    
    
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  duration_us = pulseIn(ECHO_PIN, HIGH);
  distance_cm = 0.017 * duration_us;
  
  
  
  if (distance_cm < DISTANCE_ultrasonservo) {
    servo.write(90);  }
    else {
      servo.write(0);}
      xValue = analogRead(25);
      servoPos = map (xValue, 0, 1023, 0, 90);

      if (servoPos == 0) {
        for(a1=0;a1<90;a1++){
      servo1.write(a1);
      delay(20);
      }
      for(a2=90;a2>=0;a2--){
        servo1.write(a2);
       delay(20);}

        }
      }