Arduino Controlled Servo Door Lock

1// including the servo library  
2#include <Servo.h> 
3// declaring  and defining myservo
4Servo myservo; 
5// this variable holds the values that  the servo will move
6int Position ;
7
8void setup() 
9{
10  // myservo  is connected to PWM pin 9
11  myservo.attach(9);
12//settin up the baud rate for  the bluetooth module and mobile to communicate
13  Serial.begin(9600);
14}
15
16void  loop()
17{
18  if (Serial.available() > 0)
19  {
20    //if the values recieved  are equal to 0 or 90 the sero will move to the respective angl
21    Position =  Serial.read();
22    if (Position == 0 || Position == 90) {
23      myservo.write(Position);
24    }
25  }
26}