#include <Servo.h>//include library code
Servo myServo;    //servo object
const int potPin = A0; //potentiometer attached to analog pin 0
const int servoPin = 9;//servo attached to digital pin 9
int potVal;//declare variable
int angle; //declare variable
//************************************
void setup() {
myServo.attach(servoPin); // servo attahed to servo object
Serial.begin(9600);//initialise serial communication on 9600 bps
}
void loop() {
potVal = analogRead(potPin); // value from potentiometer pin
Serial.print("potVal: ");//print value of potentiometer in serial monitor
Serial.print(potVal);
angle = map(potVal, 0, 1023, 0, 179);// change values from 0-1023 to 0-179
Serial.print(", angle: ");//print angle of potentiometer in serial monitor
Serial.println(angle);
myServo.write(angle);//turn servo arm to angle set by potentiometer
delay(15); // delay set for 15 microseconds
}