const unsigned int SERVO = 11;
const unsigned int PT = A0; 
int resistance = 0 ;
int angel = 0;

#include <Servo.h>
Servo motor ;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  motor.attach(SERVO);
}

void loop() {
  // put your main code here, to run repeatedly:
  resistance = analogRead(PT);
  angel = map(resistance , 0 , 1023 , 0 , 180);
  Serial.print(resistance);
  Serial.print(":");
  Serial.println(angel);

  motor.write(angel);
  delay(100);

}