#include <Servo.h>

Servo motorServo;

#define pinServo 3

int pos=0;
  
void setup()
{
  Serial.begin(9600);
  motorServo.attach(pinServo);
}

void loop()
{
  for (pos=0;pos<=180;pos=pos+1) {
    motorServo.write(pos);
    delay(100);
    
    Serial.print("pos : ");
    Serial.println(pos);
  }
  
  delay(3000);
  
  for (pos=180;pos>=0;pos=pos-1) {
    motorServo.write(pos);
    delay(100);
    
    Serial.print("pos : ");
    Serial.println(pos);
  }
  delay(3000);
  
}