#include <Servo.h>

Servo servo;
char message;
const int microServo = 3;     // servo on physical pin 5

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);         // set baud rate
  servo.attach(microServo);   // attach servo on digital pin 3

}

void loop() {
  // put your main code here, to run repeatedly:
  if (Serial.available() > 0){
    message = Serial.read();
    if (message == '1'){
      servo.write(45);
      Serial.println("45 degrees");
      delay(100);
    } else if (message == '2'){
        servo.write(90);
        Serial.println("90 degrees");
        delay(100);
    } else if (message == '3'){
        servo.write(180);
        Serial.println("180 degrees");
        delay(100);
    }
  }
}