#include <Servo.h> 
Servo myservo13;
void setup() {
  Serial.begin(9600);  
  myservo13.attach(13);
  pinMode(A0, INPUT);
}
  void loop() {
    int data = analogRead(A0);
    float resolution = 5.0 / 1023;
    float volt = data * resolution;
    float p = (data/5);
    myservo13.write(p);
  }