#include <Servo.h>
Servo myservo;

void setup() {
  Serial.begin(9600);
  myservo.attach(6);
  Serial.println("servo");
}

void loop() {
  if (Serial.available()) {
    char x = Serial.read();
    if (x == 'A') {
      myservo.write(0);
      delay(500);
    }
    if (x == 'B') {
      myservo.write(45);
      delay(500);
    }
    if (x == 'C') {
      myservo.write(90);
      delay(500);
    }
    if (x == 'D') {
      myservo.write(120);
      delay(500);
    }
    if (x == 'E') {
      myservo.write(180);
      delay(500);
    }
  }
}