#define pb 2
#define ledm 22
#define ledh 23
#include <ESP32Servo.h>

Servo myservo;  
int pos;    

void servoOn(){
  digitalWrite(ledh, HIGH);
    digitalWrite(ledm, LOW);
    if(pos <= 180){
      for (pos = 0; pos <= 180; pos += 1) { 
        myservo.write(pos);              
        delay(15); 
        Serial.println(pos);  
      }                    
    }
}

void servoOff(){
  digitalWrite(ledh, LOW);
    digitalWrite(ledm, HIGH);
    if(pos >= 0){
      for (pos = 180; pos >= 0; pos -= 1) { 
        myservo.write(pos);            
        delay(15);
        Serial.println(pos); 
      }                  
    }
}

void setup() {
  pinMode(pb, INPUT);
  pinMode(ledm, OUTPUT);
  pinMode(ledh, OUTPUT);
  myservo.attach(15);  
  Serial.begin(9600);
}

void loop() {
  switch (digitalRead(pb)){
    case HIGH:
    servoOn();
    break;

    case LOW:
    servoOff();
    break;
  }
}