void setup() {
  // put your setup code here, to run once:
  pinMode(A0, INPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  int ITO = analogRead(A0);
  int pwm = map (ITO, 0, 1023, 0, 100);

  analogWrite(3, pwm);

  Serial.print("Value Analog : ");
  Serial.println(ITO);
  Serial.print("Value PWM : ");
  Serial.println(pwm);

  delay(1000);
}