Servo Motor with Potentiometer

#include <Servo.h>
Servo MyServito;
const int PotPin = A0;
const int ServoPin= 9;
int PotVal= 0;
int angle = 0;

void setup() {
pinMode(PotPin, INPUT);
MyServito.attach(ServoPin);
Serial.begin(9600);

}

void loop() {
PotVal = analogRead(PotPin);
angle = map(PotVal, 0, 1023, 0, 179);
angle = constrain(angle, 0, 179);
MyServito.write(angle); //figures out how to write to the Servito-- dont need to specify what pin # is
delay(15);
}