int led1=0;
void setup() {
  // put your setup code here, to run once:
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(12, OUTPUT);
pinMode(13, OUTPUT);
pinMode(A0, INPUT);
Serial.begin(115200);
}

void loop() {
  
  // put your main code here, to run repeatedly:
  int rez = analogRead(A0);
  int led = map(rez, 0, 1023, 9, 13);
  if (led!=led1)
  {
    digitalWrite(led, 1);
    digitalWrite(led1,0);
  }
  led1=led;

  Serial.print(led);
  Serial.print(" ");
  Serial.println(led1);
}