#include <Servo.h>      // include the servo library

Servo servoMotor;       // creates an instance of the servo object to control a servo
int servoPin = 2;       // Control pin for servo motor


void setup() { 
  Serial.begin(9600);		// initialize serial communications
  servoMotor.attach(servoPin);  // attaches the servo on pin 2 to the servo object
} 

void loop() 
{ 
  int analogValue = analogRead(A0); // read the analog input 
  Serial.println(analogValue);		// print it

  // if your sensor's range is less than 0 to 1023, you'll need to
  // modify the map() function to use the values you discovered:
  int servoAngle = map(analogValue, 0, 1023, 0, 179);

  // move the servo using the angle from the sensor:
  servoMotor.write(servoAngle);                  
}