#include <Servo.h> 
Servo myservo13, myservo12; 
void setup() { 
  Serial.begin(9600);  
  pinMode (A0, INPUT); 
  myservo13.attach(13); // attaches the servo on pin 13 to the servo object
  myservo12.attach(12);
} 
void loop() {
   int data = analogRead(A0); //0-1023
  Serial.print ("Data = " + String (data)); 
  float resolution = 5.0 / 1023; //every step out of 1023 how much volt
  float volt = data * resolution; // 0-1023 x every step
  Serial.print ( "\t Volt = " + String(volt)); 
  int p = map(data, 0, 1023, 0, 180); 
  Serial.println("\t Position = " + String(p)); 
  myservo13.write(p);
  myservo12.write(180-p);
  delay(100);
}