#define myservo 5 // the pin the servo is on

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial1.begin(115200);
  pinMode(myservo, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (Serial1.available()) {
    Serial.println(Serial1.readString()); 
    if (Serial1.readString().equals("turn0")); {
      for (int x = 0; x < 50; x++) {
        digitalWrite(myservo, HIGH);
        delayMicroseconds(500);
        digitalWrite(myservo, LOW);
        delayMicroseconds(19500);
      }
    }
    if (Serial1.readString().equals("turn1")); {
      for (int x = 0; x < 50; x++) {
        digitalWrite(myservo, HIGH);
        delayMicroseconds(2500);
        digitalWrite(myservo, LOW);
        delayMicroseconds(17500);
      }
    }
  }
}