#include <Servo.h>

byte sensorPin = A0;
byte motorPin = 3;

Servo motor;

int posMotor = 0;

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

void loop() {
  // put your main code here, to run repeatedly:
  double sensorValue = analogRead(sensorPin);
  posMotor = (sensorValue/1023)*180;
  motor.write(posMotor);
  delay(25);
}