#include <ESP32Servo.h>
int counter;
Servo s1;
int a;

void setup() {
  // put your setup code here, to run once:
  s1.attach(21);
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(16, INPUT);
}

void loop() {
  delay(10);
  if(digitalRead(35)==0){
    counter++;
    delay(150);
  }
  Serial.println(counter);
  delay(100);
  if(counter%3==0){
    analogRead(16);
    Serial.println(16);
  }else if (counter%3==1){
    analogRead(32);
    Serial.println(32);
  }else{
    if(Serial.available()){
      counter=Serial.parseInt();
    }
  }
}