#include <Servo.h>

Servo myServo; 
int pos = 90;

void setup() {
  Serial.begin(9600);
  myServo.attach(3); // Attach the servo to pin 3
  myServo.write(pos); // Initialize servo position
}

void loop() {
  if (Serial.available()) {
    char command = Serial.read();
    Serial.println(command);

    if (command == 'R') { // Use single quotes for char comparison
      pos=pos+3;
      myServo.write(pos);
      delay(1);
    } else if (command == 'L') { // Use single quotes for char comparison
      pos=pos-3;
      myServo.write(pos);
      delay(1);
    }
  }
}